Lederberg and Tatum's Experiments Demonstrated That

Lederberg and Tatum's experiments demonstrated that

A) bacteria can acquire genetic material from each other.
B) bacteria do not release DNA into the environment for other bacteria to take up.
C) bacteria must be in physical contact in order for bacteria to exchange genetic material.
D) the genetic transfer occurred when the bio+,met+ phe-thr- strain transferred DNA to the bio-met- strain.
E) All of these observations were made by Lederberg and Tatum.