It is (A) common knowledge that solar heating for a (B) large office building is (C) technically different (D) from a single-family home

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

It is (A) common knowledge that solar heating for a (B) large office building is (C) technically different (D) from a single-family home.