Answer: alternative D.
Explanation: Dr. DeVries should choose his sample population randomly in order for his research to be representative, even having a specific population, which is high school seniors, that he wants to study. By <u>choosing specifically students from an exclusive college preparatory school, he isn't considering how students from other schools might perform in his research test</u>. This would be a very important step for him to understand how the practice in problem solving affects the ability related to it. Otherwise, he will have a distorted result.
Politician blue grey eyes help cry him climb history cry
Jetstream hope this helps out
Answer:
the process of developing or being developed.
"she traces the development of the novel"
synonyms: evolution, growth, maturing, expansion, enlargement, spread, buildout, progress, success, blossoming, blooming, burgeoning, headway More
2.
the process of starting to experience or suffer from an ailment or feeling.
Explanation:
