[quote="noboru"]Plants are more efficient at acquiring carbon than are fungi, in the form of carbon dioxide, and converting it to energy-rich sugars.


(A) Plants are more efficient at acquiring carbon than are fungi

(B) Plants are more efficient at acquiring carbon than fungi

(C) Plants are more efficient than fungi at acquiring carbon

(D) Plants, more efficient than fungi at acquiring carbon

(E) Plants acquire carbon more efficiently than fungi



**********
(A) Plants are more efficient at acquiring carbon than are fungi (plants are more efficient than fungi is the correct comparison here)

(B) Plants are more efficient at acquiring carbon than fungi (plants are more efficient than fungi is the correct comparison here)

(C) Plants are more efficient than fungi at acquiring carbon (answer)

(D) Plants, more efficient than fungi at acquiring carbon (no verb for main subject and comma not required)

(E) Plants acquire carbon more efficiently than fungi [(plants are more efficient than fungi is the correct comparison here)
_________________