Answer:
B. The findings are not meaningful or valid because of the way she designed her study.
Explanation:
In a scientific experiment, a control group is a group of individuals/subjects that do not receive the experimental treatment. The control group is used to determine how much of an impact a treatment (in this case, cadmium intake) has on the variables being examined in the participants who are subjected to the experimental treatment. In any experiment, it is imperative to include a control group in order to validate experimental results. In this case, it is not possible to confirm that the loss of weight and abnormal hormone levels are due to cadmium uptake because only a control group would elucidate the contribution of cadmium intake on the variables being tested.
It's definitely letter A. Mononucleosis
Hi
What occurs during an ectopic pregnancy?
Answer:
The fertilized egg develops outside the uterus.
D. Coming back from drug addiction is always hard. Never pick the easy path when it comes to these types of questions.
