The Earth is the only planet in our solar system that seems capable of supporting life as we know it. What would be the biggest problem of trying to colonize Mercury? a.) too much rainfall
b.) the planet is too big
c.) an overabundance of fresh water
d.) extreme high and low temperatures

D. Extreme high and low temperature
Although since it’s mercury... the problem would be high temperatures giving its proximity to the sun.

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