<span>A. In 1800, shoes were made by hand. In 1900, shoes were being mass-produced in factories.</span>
Answer:
The correct answer is C. critical thinking
Explanation:
Critical thinking involves the use of facts and available information about a subject/topic to arrive at a conclusion. In this case, To determine the validity of the research, Leanne needed to know first if the children were randomly assigned, because, if they weren't, then, the result of the experiment would not be accurate.
The answer is totally man vs man<span />
