(1) City gardens also help promote community. (2) Many of the non-profit organizations that help establish and manage city gardens enlist neighborhood volunteers to help with weeding, watering, planting, and harvesting. (3) A box of vegetables and the knowledge that they are helping their communities are the only rewards these volunteers seek.
Which statement, if used to replace sentence 1, improves paragraph 4?

A) City gardens can also get neighbors to work together to achieve a goal.
B) Having a city garden helps bring neighbors together through volunteering.
C) Having a city garden can sometimes encourage people to get out of their houses and meet their neighbors.
D) City gardens are also an important aid in creating a sense of community.