$setIsSubsetreturns _______ if all elements of the first set appear in the second set, including when the first set equals the second set.

$setIsSubsetreturns _______ if all elements of the first set appear in

1.	$setIsSubsetreturns _______ if all elements of the first set appear in the second set, including when the first set equals the second set.
A.	Null
B.	True
C.	False
D.	None of the mentioned
Answer» D.