What is a main idea?
A:a lesson that is not stated in a text
B:an action that leads to the main event in a text
C:a short statement of the main events of a text
D:a concept introduced in the middle of a text
A:a lesson that is not stated in a text
B:an action that leads to the main event in a text
C:a short statement of the main events of a text
D:a concept introduced in the middle of a text