Final answer:
The Compromise of 1877, where Southern Democrats accepted Rutherford B. Hayes as President in exchange for the withdrawal of federal troops and internal improvements, best explains the election of 1876 and the end of Reconstruction. Option B.
Step-by-step explanation:
The most accurate statement explaining the nature of the compromises leading to the election outcome of 1876 and the end of Reconstruction is:
Southern Democrats agreed to accept Rutherford Hayes as President in the tightly contested race if the Republicans agreed to withdraw federal troops from the South and give the southern states autonomy.
This agreement, known colloquially as the Compromise of 1877, took place after a special election commission awarded the Electoral College to Hayes despite Tilden winning the popular vote.
Southern Democrats did not block Hayes's presidency on the condition that he would remove federal troops and support internal improvements in the South, effectively ending Reconstruction but failing to protect the rights of former slaves.
So Option b is correct answer.