Which of these is the Identity Law for intersection?
AcapU=AA \\cap U = AAcapU=A
Acapemptyset=emptysetA \\cap \\emptyset = \\emptysetAcapemptyset=emptyset
AcapA=AA \\cap A = AAcapA=A
AcapA′=emptysetA \\cap A' = \\emptysetAcapA′=emptyset