Which of the following statements are true?

(A) The total mechanical energy of an object subject only to conservative forces is constant.

(B) The energy transferred by nonconservative forces is path dependent.

(C) The energy transferred by conservative forces is path dependent

(D) If an object subjected to nonconservative forces follows a closed path, the net amount of work done on the object is zero.

(E) A conservative force is affected by the speed of an object.