Which of these events most clearly helped motivate Schaffer to write "The Value of a Sherpa Life"?
A. The Nepalese government increased the insurance required for porters.
B. People reacted strongly to his 2013 article "Disposable Man."
C. An avalanche killed 16 Sherpas who were employed by mostly Western climbers. D. An expedition blog expressed sorrow for Sherpa deaths, but took no part of collective responsibility for them.