The greatest obstacle that Columbus and other European merchants encountered in their attempts to enter the Asian market:. a. the Muslim middlemen
b. the Eastern Orthodox Church
c. widespread corruption and warfare
d. the dictates of the Pope in Rome

The difference(s) between the grand canyon and valles marineris is/are: (a) the grand canyon was formed by water, but valles marineris was not. (a) valles marineris is much longer than the grand canyon. (c) valles marineris is much wider than the grand canyon. (d) valles marineris has large volcanoes near it. all of the above

The mantle is made up of which structural zones?

Which of the following is defined as combinations of soil particles that vary in size and shape?