A supporting detail is a fact， description， example， quotation， anecdote， or other item of information used to（）.

A supporting detail is a fact， description， example， quotation， anecdote， or other item of information used to（）.
A.support a topic sentence
B.back up a claim
C.explain an idea
D.illustrate a point
正确答案：support a topic sentence；back up a claim；explain an idea；illustrate a point