D. Headaches and elevated blood pressure.
Arthritis is caused by your immune system attacking your joints (rheumatoid) or overuse of the joints (osteo.) Carpal tunnel is caused by overuse of the hands. Hearing and vision loss can be caused by quite a few things, but old age is a common cause. Dental cavities are a combination of not/incorrectly brushing your teeth and other factors like eating too much sugar. Bone loss could be a calcium deficiency.
A. You think positively about yourself
this question is incomplete but I have added The Answer options to your question
a) He does not have a hypothesis.
b) He only has one group. He has not established a comparison
c) He has not measured an outcome.
d) The groups were not equal to begin with.
Answer:
b) He only has one group. He has not established a comparison
Explanation:
A randomized controlled experiment can be defined as an experiment that has two groups which it randomly assigns participants to.
These two groups are:
1.) the experimental group and
2.) The controlled group on whom the study is being performed.
Now Alberti does not have any of these groups we have listed. He performed the testing on the same people before they consumed alcohol and after they consumed alcohol. Therefore this study was not comparative in nature.
Answer:
Explanation:
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(hope this helps can i plz have brainlist :D hehe)