Britain suppressed the trans-Atlantic slave trade because?

A. there was no more market for slaves in America
B. it had become very inhuman
C. the Christian missions preached against it
D. it became unfavourable to her industrial progress.

Correct Answer: Option D

D. it became unfavourable to her industrial progress.

Explanation

Following the Industrial Revolution, the European countries needed raw materials for their industries, not slaves who used to provide cheap manual labour.