which one of the following statements about topic sentence and main idea is accurate?
A. a topic sentence is a central idea of a paragraph, while a main idea is the central idea of an entire text.
B. a topic sentence is found in the introduction, while a main idea is found in the conclusion.
C. a topic sentence does not change position, but the main idea can be found in multiple places.
D. a topic sentence and main idea are always the same.