The present perfect tense refers to an action or state that either occurred at an indefinite time in the past or began in the past and continued to the present time.
This tense is formed by have/has + the past participle.
We use the Present Perfect to talk about:
a) Experience: I have seen an alien.
b) Unspecified time before now: I have bought a car.
c) Continuing situation: I have worked here since June.
Correct answer: letter B.
b-
The present perfect is formed from the present tense of the verb have as the auxiliary verb of the clause and the past participle of its main verb.
the present perfect is used for:
a- for something that started in the past and continues in the present:
They've been married for a while.
She has lived in the shire all her life.
ß - when talking about one's experience up to the present:
I've seen that film before.
I've played the guitar ever since I was a teenager.
?- When recounting an event without a specific time:
Compare "I've lost my wallet" to "I lost my wallet yesterday".