The Boolean expression for the logic circuit shown is _____.

• A. <img src="/_files/images/digital-electronics/digital-fundamentals/cua4_0050a.gif">
• B. <img src="/_files/images/digital-electronics/digital-fundamentals/cua4_0050b.gif">
• C. <img src="/_files/images/digital-electronics/digital-fundamentals/cua4_0050c.gif">
• D. <img src="/_files/images/digital-electronics/digital-fundamentals/cua4_0050d.gif">