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:

The courts are actively to safeguard the interests and the rights of the poor.

A are actively to safeguarding

B have been actively safeguarding

C have to active in safeguarding

D are actively in safeguarding

E No correction required

ANS:B - have been actively safeguarding

No answer description is available.