An Advantage of Job Diaries Is __________, While a Disadvantage

An advantage of job diaries is __________, while a disadvantage is __________.

A) they can be administered quickly...they provide little information.
B) they can be administered quickly...they are not cost-effective.
C) they provide rich day-to-day information...they can only be collected from motivated workers.
D) they provide rich day-to-day information...they are time-consuming.