Which of the following has not played a major role in forming the grand canyon? a. erosionb. marine animalsc. the colorado riverd. deposition of sediment

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

Lol why dont you actually do the work instead of have people do it for you. jk i do it too lol