What is the primary cause for continental drift, earthquakes, and volcanic eruptions? Question 2 options:

a. heat from the Earth's core

b. rotation on the Earth's axis

c. convection currents in the mantle

d. erosion of the Earth's crust

To solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x? 6x + 5y = 2 4x + 2y = 8 a) subtract 2 times the second equation from 3 times the first equation b) subtract 3 times the second equation from 2 times the first equation c) subtract 5 times the second equation from 2 times the first equation d) subtract 2 times the second equation from 5 times the first equation