The correct answer is option C (the main idea of The Tiny Tutor is a paragraph can use more than one method of development).
"The Tiny Tutor" is a way of supporting children's learning at home. Parents are in charge of selecting the right Tutors for their children. Tutors will guide them in subjects such as maths and reading.
According to the Tiny Tutor, a paragraph may use more than one method of development such as comparison-contrast, cause-effect, description, definition, etc.