Cisterns are tanks that hold water until it is needed; if a house has a cistern, it is likely to also
a.
aqueducts.
c.
a swimming pool.
b.
a fish pond.
d.
sinks and faucets.

sinks & faucets

Explanation:

back in the day, this was an effective approach to collecting rain water for washing etc. Now we rely on community water treatment plants to treat and distribute water throughout a community.

i believe that the answer to the question provided above is that the role of campaign committees is to act as a bridge between state and local campaigns.

rain should be the answer.