The correct answer is C. 560 BC.
Lord Buddha was born in Lumbini, Nepal, in 563 BC. He was born into a royal family, but he renounced his wealth and privilege to seek enlightenment. He spent six years meditating and studying under various teachers, and he eventually attained enlightenment under the Bodhi tree in Bodh Gaya, India. He then spent the next 45 years teaching others how to achieve enlightenment. He died in Kushinagar, India, in 483 BC.
Option A is incorrect because Lord Buddha was born in 563 BC, not 586 BC.
Option B is incorrect because Lord Buddha was born in 563 BC, not 1000 BC.
Option D is incorrect because Lord Buddha was born in 563 BC, not 750 BC.