How did combining Khilafat and Non-Cooperation change the nature of the movement?

Correct answer: It became broader and more mass-based

The Khilafat movement brought the concerns of many Muslims into a common anti-colonial platform, while Non-Cooperation connected the demand for swaraj with practical actions such as boycotts and the rejection of colonial institutions. Their alliance encouraged wider participation and created Hindu-Muslim political cooperation at an important stage. It therefore changed the campaign from a narrower political effort into a broader mass movement. Option A is correct; the other choices deny this expansion.