(A) Arkansas
(B) Georgia
(C) ** Pennsylvania
(D) Texas
EXPLANATIONS BELOW
Concept note-1: -The Union included the states of Maine, New York, New Hampshire, Vermont, Massachusetts, Connecticut, Rhode Island, Pennsylvania, New Jersey, Ohio, Indiana, Illinois, Kansas, Michigan, Wisconsin, Minnesota, Iowa, California, Nevada, and Oregon. Abraham Lincoln was their President.
Concept note-2: -There are fifty (50) states and Washington D.C.The last two states to join the Union were Alaska (49th) and Hawaii (50th). Both joined in 1959. Washington D.C. is a federal district under the authority of Congress.
Concept note-3: -Pennsylvania ratified the U.S. Constitution on December 12, 1787; it was the second of the original 13 states to join the Union.