Complete the following passage summarizing the trends in population and the economy in the United States in the 1950s:
a) The 1950s witnessed a decline in population and economic growth.
b) The 1950s marked a period of significant population growth and economic expansion.
c) The 1950s experienced a stagnant economy but a rise in population.
d) The 1950s saw a decline in population but a surge in economic prosperity.
