The triangles and are congruent. Points and lie on and , respectively. Which of the following statements are true?
A) If is the midpoint of and is the midpoint of then .
B) If bisects and bisects , then .
C) If , then .
D) If and , then .
Type your answer as a list of letters separated by commas. For instance, if you believe that conditions A, B, and C are enough, then type "A,B,C" into the answer box. If you believe none of the options are correct, enter "none."