Read the following passage from "Resistance to Civil Government" by Henry David Thoreau:

If the injustice has a spring, or a pulley, or a rope, or a crank, exclusively for itself, then perhaps you may consider whether the remedy will not be worse than the evil; but if it is of such a nature that it requires you to be the agent of injustice to another, then, I say, break the law. Let your life be a counter-friction to stop the machine.
How does Thoreau use metaphor in this passage?

A.
To trigger strong emotions from the reader

B.
To change the focus of the essay to the reader

C.
To demonstrate faulty logic in common injustices

D.
To compare injustice to something concrete

D. To compare injustice to something concrete

D. To compare injustice to something concrete

The correct answer is D. To compare injustice to something concrete.

In this passage, Thoreau uses metaphors to compare injustice to mechanical objects such as springs, pulleys, ropes, and cranks. These metaphors allow Thoreau to clearly portray his perspective on how individuals should respond to injustice. By comparing injustice to something concrete, he emphasizes the tangible nature of the problem and makes it easier for readers to understand and relate to the concept. The metaphors also serve to emphasize the urgency and significance of taking action against injustice.