Does she . . . . . . . get up early and cook for family at this old age? A. have to B. has to C. is D. had

The other options are not correct because they do not express obligation or necessity. The verb “is” is used to describe a state of being, and the verb “had” is used to describe a past action. The verb “to” is a preposition, and it is not used in this context.

Here are some examples of how the verb “have to” can be used:

• I have to go to the store.
• You have to do your homework.
• We have to be at the airport by 8:00 AM.
• They have to finish their project by the end of the week.