Advertisements for a new energy drink claim that it helps people concentrate, and you are designing an experiment to test the hypothesis that the energy drink improves concentration. A large group of study participants are going to come to your lab and take a concentration test. Now you must choose independent and dependent variables for your experiment. What would be an appropriate independent (treatment) variable for your experiment?
A) How much caffeine (from all sources) participants have consumed the day of the test
B) How much of the energy drink participants report drinking in the last month
C) How well the participants can concentrate during the test
D) How much of the energy drink participants are instructed to drink right before the test

D)

Explanation:

Because the independent variable stays the same for all the people in the experiment

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wormaxio is just a fake trying to squeeze its way into the friend group. trying to pretend its cool and your best pal but how long has it really been there for you, really. it only wants you as friend to boost its social status. wormaxio is just annoying fake pleb. no offense

you and have a wonderful day

acceleration= v2-v1/t so 8m/s-3m/s / 3s =to 8/3 or

2.67 m/s^2

hope i

-lavira: )