Which of the Following Correctly Describes the Sign Test

Which of the following correctly describes the sign test?

A) It often uses the directions of differences observed in matched-pairs sample to determine whether the relative frequency distributions of two statistical populations are identical to or different from one another.
B) It is often used to determine whether a sample comes from a population with a specified median.
C) It is often used to determine whether a sample comes from a population with a specified mean.
D) Both it often uses the directions of differences observed in matched-pairs sample to determine whether the relative frequency distributions of two statistical populations are identical to or different from one another and it is often used to determine whether a sample comes from a population with a specified median.
E) Neither it often uses the directions of differences observed in matched-pairs sample to determine whether the relative frequency distributions of two statistical populations are identical to or different from one another nor it is often used to determine whether a sample comes from a population with a specified median.