Why was lincoln determined to keep the border states in the union?

a.)they were needed to protect the capital.

b.)they contained most of the south's large plantations.

c.)they had all voted to secede by narrow margins.

d.)they contained the most of the south's commercial harbors.

It IS choice A. because Lincoln wanted to protect the union's capital since it was a major moral and strategic advantage.

                            HOPE THIS HELPS GOOD LUCK IN SCHOOL

A. They were needed to protect the capital

Just took test.

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.

the answer is aggresion hope this and mark me as brainiest and add me as friend