Answer:B. Children's sharing behavior may improve with the simple passage of time.
Explanation:Internal and external validity makes the research trustworthy and meaningful.
Internal validity refers to when cause and effect relationship of a treatment and outcome can be trusted.Internal validity also occurs when there is no alternative explanation for a finding.
This means you have to be sure that there are no other factors in play with your research that everything is a result of what you have put to the research and nothing else.
Internal validity is then how confident one is to the result of the research.
Answer: the "mental hygiene movement" .
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Answer:
participate actively in interest groups or political parties
Explanation:
Individuals have a stronger voice in public policy when they <u>participate in interest groups or political parties</u>.
Participating in interest groups or political activities affords an individual the opportunity for their opinions on public matters or policies to be heard. An individual who does not participate in political parties will not have a say in policy and political decisions.

Indian Standards Institute.

<span>Because the plan was to surprise the Germans and to land in a place and at a time that they did not expect.</span>