Final answer:
Sentence A is the correct answer.
Step-by-step explanation:
The best example of a metaphor in the given choices is sentence A, “The object that we set before ourselves was to be able to clothe ourselves entirely in cloth manufactured by our own hands.” This sentence uses the object of clothing as a metaphor for the goal of self-sufficiency. By using the word “clothe” to describe the action of achieving self-sufficiency, the author is comparing the process of manufacturing cloth to the process of achieving their goal.