One of the most successful stories of wildlife conservation in India is that of the Indian Rhino, which almost went extinct at the beginning of the 20th century. Today there are about 1700 rhinos in the Kaziranga National Park in Assam! Which of the following was probably a critical step in this conservation plan?

A) controlling floods in the Brahmaputra

B) growing more grass on the Brahamaputra basin

C) controlling mass poaching at Kaziranga

D) bringing more tourists to Kaziranga