Simplify the expression using DeMorgan's theorems.

• A. <img src="/_files/images/digital-electronics/digital-systems/mca3_1019a1.gif">
• B. <img src="/_files/images/digital-electronics/digital-systems/mca3_1019b1.gif">
• C. <img src="/_files/images/digital-electronics/digital-systems/mca3_1019c1.gif">
• D. <img src="/_files/images/digital-electronics/digital-systems/mca3_1019d1.gif">