Which of the following is a requirement of the GPL license but not the BSD license?

A.
Users who modify and distribute the software under the GPL license, must make the modifications they made, available to the recipients under the same
license.

B.
The GPL license forbids the removal of copyright and license notices from source code files that are distributed.

C.
The GPL license contains a disclaimer of warranty requiring users not to hold the software authors liable for any damages.

D.
The GPL license requires that any legal disputes be settled with the mediation of the Free Software Foundation.