Suppose a Firm Is Employing Labour (L)and Capital (K)such That

Suppose a firm is employing labour (L) and capital (K) such that MPK/MPL = PK/PL.If the price of labour rises,the cost- minimizing firm should

A) employ more labour and less capital because MPK/MPL < PK/PL.
B) do nothing.
C) employ more capital and less labour because MPK/MPL > PK/PL.
D) employ more capital and less labour because MPK/MPL < PK/PL.
E) employ more labour and less capital because MPK/MPL > PK/PL.