Determining the main ideaThe main idea of the story is that______.( )

题目：Determining the main ideaThe main idea of the story is that______.( )

people living on Pemberton Street were conscious that they should make their block clean
people liked to have some one like Mable Howard as their block captain
Mable was a respected block captain who made Pemberton Street a nice neighborhood
people had fun sweeping the streets under the influence of Mable Howard