In the description of the following experiment, determine the experimental factor.
A research team is testing a product that will minimize wrinkles among older adults. Volunteers in the age group of 40 to 45 are included in the research. The research team gives a cream to be applied on the face to one group and a placebo cream to the other group.
Select the correct answer below:
- the average number of wrinkles in each group
- the group receiving the active cream
- the type of cream given to each group
- the average reduction in wrinkles for each group
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