Do the Methods of Agreement and Difference Show That Factors

Multiple Choice

Do the methods of agreement and difference show that factors are necessary or sufficient conditions?

A) Both methods show that they are sufficient.
B) Both methods show that they are necessary.
C) Agreement shows that they are necessary, difference that they are sufficient.
D) Agreement shows that they are sufficient, difference that they are necessary.
E) No, neither method shows that factors are necessary or sufficient.