Ulie usually wakes up very tired each morning, but she wants to improve her ability to function during the day. she decides that she will go to sleep an hour earlier than usual from now on. the first night, she has trouble falling asleep, and when she wakes up tired, she abandons her plan.

Before they can be published, scientific papers must be peer-reviewed. this means that: a) some other scientific experts read the papers and guarantee that they are true.b) some other scientific experts read the papers and provide quality control by eliminating many mistakes.c) an editor reads the papers, to make sure that all the semicolons are in the correct places.d) everyone in the world is given the opportunity to comment on the papers through a specially maintainedblog.e) government bureaucrats read the papers, to be sure that the papers do not insult the political positions ofthe current officeholders.