Final answer:
The correct answer is option c) William Wilberforce.
Step-by-step explanation:
The member of parliament who led the fight for abolishing slavery in Britain was William Wilberforce. He was a prominent abolitionist who worked tirelessly to ensure the passage of the Slave Trade Act of 1807, which banned the slave trade in the British Empire, and later the Slavery Abolition Act of 1833, which abolished slavery throughout the Empire. Wilberforce's dedication to the cause of abolition was driven by his moral and religious convictions, and he worked alongside others in the antislavery movement for many years to achieve these significant legislative victories.
In relation to other historical figures mentioned in the questions, John Locke was a philosopher who argued that governments should exist only with the consent of the governed and that all people are born free in a state of nature. Karl Marx, on the other hand, was a founder of sociology and believed that societies changed due to class struggle and wrote extensively about the history of society being one of class struggles.