Which of the following island nations formed a commonwealth with the United States?

a. American Samoa

b. Guam

c. Wake Island

d. the Northern Marinara Islands

The correct answer is:

d. the Northern Mariana Islands. (btw you misspelled the name)

Puerto Rico also has a Commonwealth status.

Guam, Wake Island and American Samoa are unincorporated territories but not a commonwealth - a a commonwealth is a type of an incorporated territory so all commonwealths are also unincorporated territories, but not the other way.