Answer:
A. Compound Subject.
Step-by-step explanation:
BOB and CLERKS is a compound subject who are all involved in typing courses. This is because it adds weightage and variety to the writing. It makes the subject clearer by emphasising on the subject. They can be distinguished as noun or pronoun. They sometimes combine with the other types of words to give a more diverse and distinct meaning to the words and the sentences in a complete manner. These are compound subjects giving the knowledge of the scenario properly.