Supporting details can do all of the enlisted options except introduce the main idea. Supporting details are there to support the main idea, so of course they cannot introduce it. They are the result of the main idea, not its creator.
The answer my guy or girl is B
Hello!!
When writing any research paper or essay, you should restate your thesis in your conclusion paragraph. This paragraph has the sole paragraph of giving a quick synopsis of what you just wrote about, and you need to refresh your reader on the point of your essay. For example, my thesis for a recent research paper I completed was, (volunteering benefits both individuals and society and has significant benefits to improve the lives of ourselves and others.) Try to rephrase your thesis a little bit. For example I'd say, (volunteering benefits our world and improves the lives of all it inspires.) Something along those lines. Good luck and I hope this helped.