Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

With the exception of mercury,____ at standard temperature and pressure.
A. The metallic elements are solid
B. which is a solid metallic element
C. metallic elements being sold
D. since the metallic elements are solid.