According the Cioffi and Garner Study,more Students Showed Up to Give

Multiple Choice

According the Cioffi and Garner study,more students showed up to give blood when they

A) were sent a letter asking that they reply with a "no" if they did not anticipate donating.
B) were sent a letter asking that they reply with a "yes" if they anticipated donating.
C) received an email announcement a week ahead.
D) received an email announcement one day ahead.