Read the sentence given below to find out if it contains any error. The error, if any, will be in one part of the sentence. If the sentence is error free, select No error or option 5. Ignore error of punctuation if any.

Groundwater is stored under land (A)/ so, once pumped up for drinking or (B)/ agriculture, most eventually flows to sea, (C)/ redistributing its weight around the world.(D)/ No error (E)