Which of the following sentences has an error?
select one:
a. those students will probably win the competition; they have prepared for it every day since august.
b. the bottle label says that the worst reaction to this medicine is drowsiness, so it should be safe.
c. at the beginning of the meeting, the secretary called roll, read the minutes, and the agenda was announced.
d. disappointment is part of everyday life, but most people learn to cope with it.