To determine the major product of the given reaction, let's analyze the reactants and the type of reaction occurring. The reactants are an alkene (with norbornene structure) and an acyl chloride (dichloroacetyl chloride). This setup suggests a Friedel-Crafts acylation reaction, commonly involved in introducing acyl groups into aromatic rings or alkenes.

In Friedel-Crafts acylation, the acyl chloride acts as the acylating agent. When it interacts with the double bond of an alkene, the reaction typically involves the formation of a carbocation intermediate, followed by an electrophilic addition to form a ketone as the product. The cycloalkene structure often facilitates rapid intermediate formation.

The major steps involved in this reaction are:

1. The double bond of norbornene donates electrons to form a carbocation.
2. The acyl chloride attacks the carbocation, leading to the formation of the corresponding ketone.

Considering steric hindrance and rearrangements: The bridged structure of norbornene limits major rearrangements, leading to direct acylation at a position originally bearing the double bond.

The correct answer aligns with these steps, showing the acyl group attached to the bicyclic structure:

The above compound is the major product, formed by direct acylation at the bicyclic structure.