Bydale Health Has Developed a New Cancer-Fighting Drug

Bydale Health has developed a new cancer-fighting drug.The company tests the effectiveness of the drug by conducting research using people of all age groups.The participants are segregated into groups,and each group is given a different dosage of the same drug.In this scenario,the dependent variable is the:

A) progression of the disease.
B) amount of money spent in developing the drug.
C) number of participants in each group.
D) dosage of the drug administered to the first group.