PLZ ANSWER CORRECTLY. Highlight the topic sentence. Hills and mountains are land formations that are both alike and different. Hills and mountains both rise above the land around them. They are both made of the same material. Hills rise more gently than mountains. Mountains are taller than hills. Generally, a land form must rise at least 2,000 feet above the surrounding land to be called a mountain. Because hills and mountains are so much alike, there is not a scientific difference between the hills and mountains. A. Which sentence supports the topic sentence with the idea that hills and mountains are alike (Hills and mountains are land formations)...(they are both made of the same material)...(Hills rise more gently than mountains). B. which sentence supports the idea that hills and mountains are different (mountains are taller than hills)...(Hills rise above the land around them)...(They are both made of the same material). C. the concluding statement includes the idea that (a mountain rises more then 2,000 feet high) (hills and mountains aren't scientifically different) (hills and mountains have the same material).​