Directions: In the question given below, a sentence is given, divided into parts. One of the parts may contain an error. Identify the part that contains the error and mark it as the answer. Ignore errors in punctuation. In case the sentence is correct as it is, mark option (E), i.e. 'No error'. Note - The words in bold are grammatically and contextually correct.

The shortage of doctors / means people aren't (A)/ having regular routine checkups (B)/ that prevent / small problems (C)/ from becoming big ones (D)/. No error (E)