1.Lack of money led the company to a situation ___ they had

1.Lack of money led the company to a situation ___ they had to decide whether they should keep on with their production.
A.when B.where C.that D.which
2.You and I could hardly work together, ___ ?
A.could you B.could't I C.could't we D.could we
分别是选什么啊?请附上理由~
急啊！！！