Answer:
e) opium
Step-by-step explanation:
The East India Company established the monopoly on the opium cultivation in Indian province of the Bengal because of the tremendous growth in the demand of the opium in the China. In India, the company developed method of growing the opium poppies much cheaply and abundantly and transporting it to China.
Levels of the opium addiction grew so high which also formed a network of the opium distribution with connivance of the corrupt officials. It then began to affect imperial troops and the official classes which lead to opium war.