Acompany that manufactures a popular multivitamin wanted to determine whether their multivitamins had any side effects. for its initial study, the company chose 2000 individuals to take one of their multivitamin tablets per day for one year. scientists from the company surveyed the participants to determine whether they had experienced any side effects. the greatest problem with this procedure is that

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.

precisely the author keeps the interest of readers not describing clearly the   kind of relationship in giselle's family. by doing this, readers had to imagine and assume how it was.   instead, the author described better scenes with dark star and the influence of books about horses in giselle's life and actions.   also the fact that she broke her arm but not referring to it in detail leads the readers to imagine and guess what could have occurred.

answer; monaxial;