Which of the Following Statements Is True

Which of the following statements is true?

A) A defendant who has received a benefit pursuant to a contract rescinded for undue influence will be required to return only what is left so long as he has not acted with bad faith.
B) In cases of actual undue influence, the complainant must show that there was undue influence; whereas in cases of presumed undue influence, it is the defendant that must show that there was no undue influence.
C) A contract procured through undue influence cannot be affirmed by the complainant.