20 seconds approach
A. future,
but only if such agencies would take responsibility for conducting background checks and identity verification of prospective employees
but as contrast is NOT necessary
B.
future only if such agencies take responsibility for conducting background checks and identity verification of prospective employees
looks fine
C.
future only if responsibility to conduct background checks and identity verification of prospective employees would be taken by such agencies
agency we need not responsibility first
D.
future but only if responsibility for conducting background checks and identity verification is taken by such agencies of prospective employees
the error of A compounded with C
E.
future only if responsibility to conduct background checks and identity verification of prospective employees were to be taken by such agencies
same
B is the answer