Circle the letter A B C or D to indicate the correct answer to each of the following questions, Circle the letter A; B; C or D to indicate the correct answer to each of the following questions, Circle the letter A; B; C; or D to indicate the correct answer to each of the following questions, Circle the letter A. B. C or D to indicate the correct answer to each of the following questions, Circle the letter A. B. C. or D to indicate the correct answer to each of the following questions.