B. monopoly
Since that company bas almost all of the long phone service, it means that the company is a monopoly because it has exclusive control over phone service in general. There's little competition, so the company can do almost anything it wants to (even raise prices they charge their customers).
The action verb in a sentence is the verb that is being perused or “acted upon” (to help you remember) by the subject.
The subject in this sentence is “we” so the verb that matches up with this subject is A. Learned.