What causes western boundary currents to be faster and deeper than eastern boundary currents? a. Thermohaline circulation
b. heating at the equator
c. The Coriolis effect
d. Warmer water occurs in the west
e. upwelling

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.