“That has a ring to it” “got the hang of it”
The correct answer is A. When the subject of a sentence is singular, add "_s" to the base form.
An easy example is "to exist", the base form is "exist" and A strawberry exists shows that you add s when a singular subject is used.
The answer is implication
It's D. The verb 'buy' is transitive as it takes a DO.
