Please verify, Grammar

Hi,

Could you please verify the answers.

The Research and Development Department ________ to develop a new product line by the end of the month.

(A) is needing
(B) must
(C) needs
(D) should

Ans C

__ Tanya saw my car, she didn't know that it was red.

(A) After
(B) While
(C) Until
(D) As

Ans C

We need to consider ________ the terms of the contract.

(A) renegotiate
(B) to renegotiate
(C) renegotiating
(D) renegotiation

Ans C

Greg said he ________ help next time.

(A) would request
(B) will request
(C) might have requested
(D) requested

Ans A

Regards,
Raj.