John Tyler became the tenth President of the United States (1841-1845) when President William Henry Harrison died in April 1841. He was the first Vice President to succeed to the Presidency after the death of his predecessor. As a Senator he reluctantly supported Jackson for President as a choice of evils.
The answer to the question above is letter D. The best description of the effect that "Baby Boom" had on the American economy is that the "Baby Boom" led to the increased of consumerism, growth in the housing market and the growth of the middle class.