Which of the following definitions best fits the term underclass? A.
a city's level of pollutants and emissions
B.
a city's poorest and most disadvantaged citizens
C.
a city's urban heat island structures
D.
a city's economic leadership

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion

ddd    idk or c

Canada and