Question

in 1887, one the worst floods in history occurred in china. it was caused by
a broken water pipes under the ground.
b an explosion in a water treatment plant.
c a long period of heavy rain.
d farmers using too much water.

Explanation:

Floods are typically caused by excessive water accumulation, and a long - period of heavy rain is a common natural cause. Broken water pipes, water treatment plant explosions, and farmers using water are not typical causes of large - scale historical floods.

Answer:

C. a long period of heavy rain.