Answer: Hey, I know this is probably a little too late, but I believe that your answer would be A.
Explanation: Coordinating conjunctions are commonly called FANBOYS. It is an acronym that represents the following words:
For
And
Nor
But
Or
Yet
So
A is the only sentence listed that contains one of the FANBOYS (coordinating conjunctions). See the sentence below to see the highlighted conjunction.
I will teach you the laws to follow, and you will obey them or else.