Change diet and lose weight
Answer:
4) No control group was used.
Explanation:
In order to check the side effects of this multivitamin tablet. It is first important to establish a control group. If the control group does not have the side effects which the treatment group of individuals (those who have taken the multivitamin tablet) have, it shows that the side effect is purely because of the tablet.
It depends on who you get but, in general no. They could rip you off or worse.
Electrocardiogram (ECG) Electroencephalogram (EEG)