The main theme is the fragility of sanity, guilt versus innocence, and the unrelenting passage of time. The fragility of sanity: the narrator's attempt to prove his sanity, his erratic mannerisms while he explains his meticulous plans for killing the old man only prove his madness.
A thesis statement must give three points of support. It should indicate that the essay will explain and give evidence for its assertion, but points don't need to come in any specific number.
Answer:
A) first and last points made
Explanation:
They have the most influence and strongest points.