Which of the following is true concerning continental crust? a. It does not contain radioactive elements. B. It mostly contains heavier and denser minerals than the mantle. C. It efficiently transfers heat from the mantle to the surface. D. None of the above Please select the best answer from the choices provided A B C D.

What was the most difficult obstacle to overcome in the creation of an autonomous state after indian independence was achieved? a british willingness to go to war to retain the region b. religious differences between hindus and muslims c. ethnic differences between tribal regions d. indian princes' inability to decide on a format of government

Mexico city is an example of how humans alter their environment because it was a. one of the world’s largest cities b. built on drained and filled lake beds c. built after conquest by the spanish d. once the capital of the aztec empire

One disadvantage that darwin faces today is w. enemy attacks x. natural disasters y. lack of land bridge z. high population density