Question

Identify the principal or main clause in the following sentence:
The lights were turned on and the doors were opened.

• A. The lights
• B. the doors
• C. the lights were turned on
• D. the doors were opened

Answer 1

Answer: (C), (D)

The correct options are
C the doors were opened
D the lights were turned on

Principal clauses form a complete sentence and can stand alone without any extra information. Here both "the lights...on" and "the doors were opened" make complete independent sentences, hence Option C and D are correct. The rest of the options do not adhere to the goal, hence incorrect.