In the following question, a sentence is given with four words marked as (A), (B), (C) and (D). These words may or may not be placed in a correct order. Four options with different arrangements of these words have been provided. Mark the option with the correct arrangement as the answer. If no rearrangement is required, mark option (5) as your answer.

It took him a lot of time to lack(A) his crippling battle(B) of concentration(C) so that he could finish his work on time(D).