Which of the following early urban societies did not always build major cities in river valleys? a. the huang he valley b. mesopotamia c. the indus valley d. mesoamerica

The answer is D i just took the test and guessed it 

Catac, dry land,and lizards

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