Question

what should a strong conclusion do?
a. add a new argument
b. summarize key ideas
c. restate the thesis
d. quote the introduction

Explanation:

A strong conclusion synthesizes the core points of a work without introducing new content. Restating the thesis is part of it, but the broader, key function is summarizing all key ideas to wrap up the work. Adding new arguments disrupts the conclusion's purpose, and directly quoting the introduction is not a standard requirement for a strong conclusion.

Answer:

b. Summarize key ideas, c. Restate the thesis