Which of These Statements About Disaster Relief Supply Chains Is

Which of these statements about disaster relief supply chains is best?

A) Critical supplies are usually deployed the instant they are available in the disaster zone.
B) Employee turnover in disaster relief is low since these individuals are dedicated to the cause.
C) Most disaster relief supply chains exist for only short times.
D) Supplies follow a pull flow initially but change to a push flow once demand is more predictable.