Research on the Well-Being of Americans Indicates That the

Research on the well-being of Americans indicates that the

A) vast majority of Americans currently declare themselves to be very happy.
B) personal happiness of Americans has been increasing during the last half-century.
C) buying power of Americans has been decreasing during the last half-century.
D) increase in the buying power of Americans during the last half-century has provided no apparent boost to Americans' personal happiness.