2. The jazz band has played all night and are finally ready to go home.

A.  has played all night and are finally

B.  has played all night and is finally

C.  have played all night and are finally

D. have played all night and is finally

E. has been playing all night and are finally

The jazz band has played all night and are finally ready to go home.

Grammar issue presented: subject/verb agreement

The subject of the sentence is jazz band, which is a group, but is a singular entity.  Therefore singular verbs must follow.  Has is singular, but are is not.

A.  has played all night and are finally

-  has (singular), are (plural) Agree: NO

B.  has played all night and is finally

-  has (singular), is (singular) Agree: YES

C.   have played all night and are finally

-  have (plural), are (plural) Agree: NO (Although the verbs have played and are agree with each other, they do not agree with the singular subject jazz band.)

D. have played all night and is finally

- have (plural), is (singular) Agree: NO

E. has been playing all night and are finally

- has (singular), are (plural) Agree: NO

(B) is correct because it is the only choice in which both verbs agree with a singular subject.

Q.1 Easy

Q.3 Easy