What is the present perfect form of the verb to be.
he a businessman for many years.
a.
will have been
b.
had been
c.
is
d.
has been

D. Has been.

The reason this is, is because the phrase "has been" means in the past continuing onto the present. Some might say it's C, but that doesn't sit write on the tongue when saying "He *is* a business man for many years" Because the sentence itself is talking about the past as well as the present.

Bwould be the answer