In the question below, an incomplete statement (Stem) followed by fillers is given. Pick out the best one which can complete the incomplete stem correctly and meaningfully.

Unless you work harder you will fail, means ......

A.

if you fail, you will work harder

B.

you must at least plan well than you will not fail

C.

hardly you will fail if you do not desire so

D.

if you do not put more efforts, then you will fail

E.

if you only work and work alone, you will fail

Correct answer is D

No explanation has been provided for this answer.