The correct answer is a: High blood pressure.
Answer:
No; the study is based on a volunteer sample, which may be very different from a randomly selected one.
Explanation
Her plan cannot be effective because she could base her own judgenent on samples that was randomly selected for consideration.
Bones are hard because they are made up of bone marrow and muscles are soft because they are muscles
Answer:
The answer would be 4. just yourself
Explanation:
If you only have yourself for support then theres no system in place
