Political parties are/were... A: a necessary part of government according to the Constitution

B: illegal organizations during the 1900's

C: not mentioned at all in the Constitution

D: harmful

A

Explanation:

because we can't say harmful so that is gone

now next one illegal that is also not and it's mentioned so it is also not the answer so it is only left so easy

monasticism. people often do monasticism in monasteries

slavery, abortion, donald trump, gay marriage, racial rights, immigration  

explanation:

anything that has been broth up to the supreme court is something of grate political divide   so just look as court cases