Which river drains all of the land between the rocky and appalachian mountains?
a.

the columbia
b.

the colorado
c.

the rio grande
d.

the mississippi

The correct answer is option D. the Mississippi.

The Mississippi River, the largest river of the United States, drains a large portion of the land area between the Appalachian Mountains and the Rocky Mountains. The Mississippi River also carries all the water through many the American states and finally discharges it into the Gulf of Mexico.  

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.