The task is to rearrange the given five sentences (A, B, C, D, E) to form a coherent and meaningful paragraph and identify the first sentence of this rearranged paragraph.

Identifying the Topic Sentence

Let's analyze each sentence to understand its role:

• A. Introduces a personal experience about studying one subject at a time during final exams.
• B. States an observation about learning speed through immersion, which likely explains the decision in sentence A.
• C. Presents a general principle or a thesis statement about the importance of focus for success. This type of broad statement often serves as an introductory sentence.
• D. Contrasts the personal approach (implied in A) with the methods of peers, highlighting a difference.
• E. Provides a specific detail about the study method, starting with "And," suggesting it follows another related point.

Determining the Logical Paragraph Order

A logical paragraph typically starts with a general statement, followed by supporting details, examples, contrasts, and explanations. Based on this structure:

1. Sentence C ("Real success happens when we focus on one thing at a time.") is a strong candidate for the first sentence as it presents a universal concept about focus and success.
2. Sentence A ("When I was preparing for my final exams, I decided to study only one subject at a time.") provides a specific personal example that directly illustrates the principle stated in C.
3. Sentence D ("Most of my peers studied multiple subjects a day.") introduces a contrast to the approach mentioned in A, further emphasizing the effectiveness or uniqueness of the focused method.
4. Sentence B ("I noticed that I could learn something way faster if I immersed myself in it for a few days.") offers a reason or observation supporting the decision made in sentence A, explaining the benefit derived from focusing on one subject.
5. Sentence E ("And I only moved on to the next when I fully grasped the material.") elaborates on the method described in A and B. The conjunction "And" links it smoothly to the preceding idea of immersion and learning faster, detailing the process further.

Thus, the most logical sequence for the sentences to form a meaningful paragraph is C, A, D, B, E.

Conclusion on the First Sentence

Following the logical flow identified above, the paragraph begins with the general principle about focus. Therefore, the first sentence of the rearranged paragraph is C.

The rearranged paragraph is:

C. Real success happens when we focus on one thing at a time. A. When I was preparing for my final exams, I decided to study only one subject at a time. D. Most of my peers studied multiple subjects a day. B. I noticed that I could learn something way faster if I immersed myself in it for a few days. E. And I only moved on to the next when I fully grasped the material.