The answer in the space provided is experiments. It is because in order to produce causation or to likely have a cause of something in particular, they need to conduct experiments in which they will likely form new ideas and test this ideas to form something new that will cause and contribute to others and will be of gain of knowledge.
Answer:
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The answer for that should be A
The answer is "Cuban Americans".
This early rush of Cuban settlers has middle livelihoods well over those of different Latinos/as; be that as it may, this gathering is still underneath the national normal. The second flood of Cuban Americans, touching base in the 1970s, has fared more regrettable. Numerous had been discharged from jails and mental healing facilities in Cuba, and their landing filled an upsurge in partiality against every single Cuban American.