Answer:
B. Cross-Sectional
Explanation:
A Cross-sectional study of design is a kind of design of observational study . In the cross-sectional study, an investigator measures or examines the outcome as well as the exposures in any study participants at the same time.
Cross-sectional design research includes using some different category of the people who differ in some variable of interest but they share few other characteristics, like educational background, socioeconomic status and ethnicity.
A Cross-sectional studies are mostly used by experimenters or researchers to study the developmental psychology in humans.
Thus in the context, the researcher using 50 participants to study the developmental changes in their choices to listen to music is a type of cross sectional research design.
Hence the correct option is (B).
<span>The most unpredictable presentation aid a speaker could use is a person or an animal.
Presentation aids are things other than the expressions of a speech that are utilized to support the goal of the speaker. Specifically, they can be visual aids, sound aids or other supporting innovation.</span><span /><span>
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Answer:
Blockade of the southern ports was an important war times strategy of the North during the Civil War.
Explanation:
Northern forces organized a blockade of Confederate ports to prevent cotton exports and war material from smuggling into the Confederacy. It was a significant economic strategy that effectively prevented Confederate access to arms that could be manufactured by the industrialized north itself. Despite the economic loss Britain and France remained neutral and therefore the international concern was not an issue anymore in the war.
The answer would be b I’m pretty sure because it’s the longest
