According to De Morgan's Law, what is (A∩B)c(A \cap B)^c(A∩B)c?
Ac∩BcA^c \cap B^cAc∩Bc
Ac∪BcA^c \cup B^cAc∪Bc
(A∪B)c(A \cup B)^c(A∪B)c
Ac∖BcA^c \setminus B^cAc∖Bc