The answer is C. Unexplainable muscle weakness or pain.
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Answer:
d) correlational research
Explanation:
Because of the number of people in this study, researches have enough evidence for settle a relation among helping in different situations.
Correlational studies, are used in psychology to relate two or more variables. In this case, how is the behavior or disponibility of men and women in front of different events like helping animals, people in street, people in danger, etc.
Post dramatic stress disorder
Behaviors that could lead to unhealthy relationships are being too clingy or demanding. the more arguments you get in sometimes, the more toxic the relationship could become.
Brain power is the correct answer.