A puzzling question

Lincoln’s goal to reunite the country had come true, but he would not live to see it. Just six days after the end of the war, on April 15, 1865, President Lincoln was killed by
John Wilkes Booth. He was the first American president to be assassinated. Abraham Lincoln is considered one of the greatest American presidents.

Choose the correct answer from a, b, c or d:
1- Lincoln’s goal to reunite the country ……..during his life .
a. hadn’t come true
b. had come true
c. achieved
d. oblivious

I go for 'b'. Am I right?