The right option is letter "A": Grayson is underemployed.
The primary concern addressed by the researcher while designing this study was the confidentiality of the individual participants' responses. The survey approach allowed respondents to answer questions anonymously and submit their answers in a secure box, enabling them to share their opinions without reservations.
Europe became a significant origin of migrants due to the declining economic circumstances for the middle class in the continent.
Explanation:
European nations were in the process of colonizing new territories throughout the century, and conditions for the middle class at home worsened, often prompting individuals to seek better prospects either in colonies or alternative nations.
As a result, mass migrations were particularly directed towards the New World.
This era also saw migrations to Australia, New Zealand, and other countries colonized by Europeans in pursuit of improved living conditions.