In the following question, some part of the sentence may have errors. Find out which part of the sentence has an error and select the appropriate option. If a sentence is free from error, select 'No error'.

The Manager warned his team members (a:/ that if they persist in their (b:/ obstructionist attitude they would be punished. (c:/ No Error (d:

A

1

B

2

C

3

D

4