The impact of the opium trade in China can primarily be described by option c. Resulting in addiction and conflict.
The opium trade, particularly during the 19th century, led to widespread addiction among the Chinese population, causing significant social and health issues. Additionally, it contributed to major conflicts, including the Opium Wars between China and Britain, which resulted in significant territorial and sovereignty losses for China. While there may have been some economic aspects tied to the trade, the predominant legacy of the opium trade in China is one of addiction and conflict.