Answer:
d. relies on a sample that is too small to represent the entire corporate workforce
Step-by-step explanation:
the conclusion is suspect because a 100 employee in a single corporation is too small to represent the entire corporate workforce. Larger sample size involving more than one corporation will be more representative than using a single corporation, the study is not random.
Option A is wrong because it was never stated by the researcher that corporate employees are more sleep deprived than other people.
Option C is wrong because the effect of sleep deprivation is out of the scope of the study.
Option B is also wrong because the evidence provided is statistically possible.