Which Is True Regarding a Buyer's Right to Waive Warranties

Which is true regarding a buyer's right to waive warranties?

A) A buyer may not waive warranties.
B) A buyer may waive implied warranties,but not express warranties.
C) A buyer may waive express warranties,but not implied warranties.
D) A buyer may waive both implied and express warranties.
E) A buyer may waive express warranties and the implied warranty of fitness for a particular purpose,but not the implied warranty of merchantability.