Which, If Any, of the Following Statements Are False

Multiple Choice

Which, if any, of the following statements are false?

A) Stem-loop structures are formed by base pairing of complementary sequences that are separated by a short sequence of nucleotides with unpaired bases.
B) Stem-loop structures are common occurrences in both DNA and RNA.
C) Stem-loop structures are important for structural reasons only.
D) Stem-loop structures can be important functional elements.