The correct answer is: C. China and Britain.
The First Opium War was fought between the Qing dynasty of China and the British Empire from 1839 to 1842. The war was caused by the British desire to expand its trade with China and the Chinese government’s attempts to restrict the opium trade. The war ended with the Treaty of Nanjing, which forced China to open up its ports to British trade, cede Hong Kong to Britain, and pay a large indemnity.
Option A is incorrect because Egypt was not a major player in the First Opium War.
Option B is incorrect because Greece was not a major player in the First Opium War.
Option D is incorrect because France was not a major player in the First Opium War.