Sentence Correction - Verbal and Reasoning

Directions to SolveWhich of phrases given below each sentence should replace the phrase printed inboldtype to make the grammatically correct? If the sentence is correct as it is, mark 'E' as the answer.
Q1:

They continued to work in the field despite of the heavy rains.

A even though there is heavy rain

B although heavily rains

C in spite the heavy rains

D even though it rained heavily

E No correction required

ANS:D - even though it rained heavily

No answer description is available.