[Grammar] "I wish I didn't have to" and/or "I wish I hadn't had to"

[Mori]

I have a splitting headache. I wish I _____ go to work today.
a. haven't had to
b. didn't have to
c. hadn't had to
d. don't have to

The ILI English Series, High-intermediate 2 Workbook, page 38

The answer key says b is the right option, but I think d is correct, too: You had a hard day at work and now you have a splitting headache.
What do you think?

P.S. Sorry for the typo: I think the other option is c (NOT d).

 

[GoesStation]

B and C are possible. D isn't.

 

[Mori]

B and C are possible. D isn't.

Shoot! That's what I meant as the question title shows. Sorry for the typo and thanks for the answer! :up:

 

[Charlie Bernstein]

B and C don't mean the same thing. Do you understand the difference?

 

[Mori]

B and C don't mean the same thing. Do you understand the difference?

Yes, I do. Thanks for reminding!