Sentence Correction (SC) | Retrospective analyses shows that pro-biotic therapeutic compounds

Retrospective analyses shows that pro-biotic therapeutic compounds in plants and other biological sourcesare usually able to be augmented, which makes them more effective drugs .

A. are usually able to be augmented, which makes them more effective drugs
B. are usually able to be augmented to make them a more effective drug.
C. are usually able to be augmented to make them more effective drugs
D. can usually be augmented to make them a more effective drug
E. can usually be augmented to make them