Read the sentence below to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Choose the option with that part as your answer. If there is no error, choose 'D' as your answer. (Ignore the errors of punctuation, if any).

In management, as you rise higher, the problems you face become more and more unstructured and you can't just fall back on the tools you had been using.

A.

In management, as you rise higher,

B.

the problems you face become more and more unstructured and you can't just fall back on

C.

the tools you had been using.

D.

No error.

Correct answer is B

the problems you face become more and more unstructured and you can't afford to fall back upon