Rule 1. A subject will come before a phrase beginning with of. This is a key rule for understanding subjects. The word of is the culprit in many, perhaps most, subject-verb mistakes.
A bouquet of yellow roses lends color and fragrance to the room.
Rule 2. Two singular subjects connected by or, either/or, or neither/nor require a singular verb.
My aunt or my uncle is arriving by train today.
I was just okay i’m okay but it wasn’t really
The subject nouns in these sentences are
work
garden
God
The answer is B) Video of Ben giving Corky a treat after he stops barking
