The National Green Tribunal (NGT) has imposed a complete ban on plastic bags in the pilgrimage towns of Haridwar and Rishikesh, slamming the authorities for lackadaisical attitude in keeping the Ganga clean.

Question: Plastic bags are one of the major causes of the degradation of water quality in Ganga.
Options:
A. true, B. false, C. uncertain
Answer: "A"