Which source would be most useful for a researcher writing an informative article on avoiding skiing injuries? (3 points)

A. "Take Your Kids Skiing," a parent-friendly website featuring information on kid-friendly ski areas
B. Conquering the Big Slopes: Strategies for Advanced Skier by Herschel Adams, 2012
C. Instructions on beneficial strengthening exercises by specialists in joint and bone health
D. The National Oceanic and Atmospheric Administration's long-range snow forecast for this winter