Nonrenewable resources can be viewed as a) energy sources using wind power. b) energy sources using solar power. c) existing in a fixed amount, but are easily replaced. d) existing in a fixed amount; they will run out eventually.

The answer i think is d

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