Which conjunction should fill in the blank in the following sentence either you can retake the test tomorrow blank you can do some extra-credit work a. but b. and c. nor d. or

The conjunction that should fill in the blank in this sentence is the word OR. So, you can retake the test tomorrow or you can do some extra-credit work, These types of conjunctions, called correlative conjunctions, always go in pairs, such as either-or, neither-nor, not only-but also, etc. So, the conjunction is used to show that a person has to choose between these two things. Nor cannot be used because it is a negative conjunction. But and and do not fit here.