Which statements are main ideas of "Harriet Tubman and the Underground Railroad"? Select the two correct answers.

A.Tubman and her brothers are worried about being separated.

B.The Underground Railroad is an organization that helps people escape slavery.

C.Tubman risks her life to escape alone to find freedom in Pennsylvania.

D.The Underground Railroad has nothing to do with trains or traveling.

Subject verb agreement is when your subject and you verb basically agree. If your subject is singular than your verb also has to be singular.

Example.

DOG= noun subject
CHASES=verb

The DOG CHASES the cat.

In the sentence you are talking about a single dog so it is singular. Because the noun subject is singular the verb then has to be singular. It wouldn't sound right if you had a plural verb with a singular subject.

Example.

DOGS= subject
CHASE= verb

The DOGS CHASE the cat.

Now in this sentence they are talking about more than one dog so it becomes plural. Because the subject is now plural the verb also has to become plural.

Hope this helped!