The term "Baby Boom" most often refers to the post–World War II Baby Boom (1946–1964) when the number of annual births exceeded 2 per 100 women (or approximately 1% of the total population size). There are an estimated 78.3 million Americans who were born during this period.
D seems like the answer because it’s a cause you can put money towards meanwhile the other three need to be regulated by branches/they’re just opinions