Final answer:
The reason 'Only those who worked could get good health insurance' was not a valid reason for immigrant families to work since health insurance was not common or tied to employment during the historical immigration period.
Step-by-step explanation:
The correct answer to the question is D. Only those who worked could get good health insurance. In the historical context of immigration during the late 19th and early 20th centuries, health insurance as we know it today was not widely available or linked to employment. Immigrants had to find jobs for a variety of reasons. This included issues like the need to repay debts incurred during their journey to America and the insufficiency of a single income to support their families due to low wages and the high cost of living. They often took up poorly paid jobs out of necessity and did not have the luxury of obtaining good health insurance. Thus, the reason that health insurance was tied to employment was not a factor for most immigrant families needing to work.