Consider the following sentences:
(A) The economic integration and soft borders between the two Irelands were the key aspects of the 1998 Good Friday agreement.
(B) The economic integration and soft borders between the two Irelands has been the key aspects of the 1998 Good Friday agreement.
(C) The economic integration and soft borders between the two Irelands was the key aspects of the 1998 Good Friday agreement.
(D) The economics integration and soft borders between the two Irelands were the key aspects of the 1998 Good Friday agreement.
Which of the above sentences is/are grammatically CORRECT?
1
(D) and (A)
2
(B) and (D)
3
(C) and (B)
4
Only (A)