Some of the sentences have errors and some have none. Find out which part of a sentence has an error, and the appropriate letter $\text{(A), (B), (C)}$ is your answer. If there is no error, $\text{(D)}$ is the answer.
$\underset{\text{(A)}}{\text{A good reason for marking favourite passages in books is that this practice} \\ \text{enabling you to remember more easily the significant sayings,/}}\\ \underset{\text{(B)}}{\text{to refer to them quickly, and then in later years; /}} \\ \underset{\text{(C)}}{\text{it is like visiting a forest where you once blazed a trail./}} \underset{\text{(D)}}{\text{No error}}$