According to the textbook, presidents have difficulty surviving two terms in office and maintaining their popularity because ______.

All of the following are reasons that help explain why the United States now relies less on nuclear power than it previously did EXCEPT ______.

A. the lack of good places for nuclear reactors, due to the passage of “nuclear-free zone” legislation in nearly all states B. problems in disposing of nuclear wastes C. safety and environmental problems D. the slow pace of nuclear power plant construction due to opposition and frequent inspections

Programs that require someone to have a low income in order to participate are known as ______.

Fill in the blank(s) with the appropriate word(s).