Could you help me answering these questions ?

1-Because of the recent number of break-ins to our system, security measures _______ at the present.

A)     Have been strengthened  b) will strengthen c) have strengthen  d) are being strengthen

2-The director said that we had to downsize the engineering team by 20 percent if the negotiations had fallen through.

What is wrong in the sentence ?

A)    a) Had

B)     b) By

C)      c)If

D)     d)Had fallen