Answer:
It's either B or D but I think it's most likely going to be B
Explanation:
The word that correctly completes the given sentence above would be driving. The complete sentence is: They will be driving to Chicago next week. The verb takes the -ing form, which is the simple future tense of the verb because the action indicates that it will be done some time in the future and is not yet started.
C, as gods plan to help teach about dangers of sin