3. 如圖(3)所示電路,其實現的布林函式 F(A,B,C,D)為何?(A)Σ(1,3,4,11,12,13,14,15) (B)Σ(1,3,5,6,7,11,12,13,14,15)(C)Σ(0,2,4,11,12,13,14,15) (D)Σ(1,3,4,5,7,12,13,14,15)