This passage from Francis Bacon compares civil war to a fever (harmful, weakening) and foreign war to physical exercise (beneficial, strengthening the body/nation).
Option A (Directive): The comparison implicitly advises the reader on how to act - avoid civil war (since it is like a harmful fever) but do not necessarily avoid foreign war (since it is like healthy exercise). This guides action or policy, so this directive interpretation is correct.
Option B (Informative): The passage also makes an explanatory claim - it informs the reader that civil war weakens a nation while a foreign war can strengthen it, just as a fever weakens the body while exercise strengthens it. This descriptive, explanatory content is informative, so this interpretation is correct as well.
Option C (Expressive/Emotive): This option claims the passage's function is to evoke sympathy for civil war and disapproval of foreign war. This is incorrect on two counts - the passage evokes disapproval of civil war (not sympathy toward it), and more importantly its structure is a reasoned analogy meant to inform and guide action, not to stir an emotional reaction; hence the expressive/emotive interpretation is not the intended function here.
Hence the passage combines directive and informative functions, matching options A and B, but not C. The correct answer is A and B only.