Which statement best describes the scholars of the renaissance known as humanists

The correct answer for the question that is being presented above is this one: "C. They studied the ancient arts of philosophy, history, science and literature, and they applied these studies to their own lives." Renaissance scholars were called humanists because they were less concerned about mysteries of heaven and more interested in the world and humans around them. 

Here are the following choices:
A. They took God out of the center of their lives and replaced Him with humanity. 
B. They based all of their studies on direct observation of nature and did not offer opinions about religious matters at all. 
C. They studied the ancient arts of philosophy, history, science and literature, and they applied these studies to their own lives. 
D. Although their work advanced science and philosophy, it had little impact on artists or religious leaders of the time.