Read the following context and choose the best option to answer the question.
Context: The Blanket II Corinthians 9:7 " Every man according as he purposeth in his heart , so let him give , not grudgingly , or of necessity ; for God loveth a cheerful giver . " Five years ago my mother and I offered help to our friends , driving them across Knoxville to the Cancer Center . When we arrived , the wife escorted her husband back to where he would receive chemo . Mom and I brought needlework and sometimes a book . We sat near the door to help those in wheelchairs .
Question: What may be the reason for their charitable work ?
Options: 
A. Their religion tells them to do it .
B. None of the above choices .
C. They believe that helping others is the right thing to do .
D. They were told to by the bible .


C