A rock rests on the ground. A force pulls the rock toward the earth, and another force pulls the rock toward the moon. Which statement best explains why the rock stays on the ground?

Only one force can act on an object at one time.

The rock is moving, but it's not visible to the human eye.

The force pulling the rock toward the earth is greater than the force pulling the rock toward the moon.

The force pulling the rock toward the earth is weaker than the force pulling the rock toward the moon.

they required less loading and unloading

explanation:

the shipping container improved shipping because it cut down on unloading time by three weeks, eliminated wasted space, and allowed ships to carry.

i believe the answer is d.

native americans suffered high rates of poverty and unemployment.

during the late 1960s and early 1970sthe need for political militancy grew among the native americans. throughout the 1960s, they had been the nation's poorest minority group, the most deprived group, according to practically every socioeconomic measure. in 1970, the indian unemployment rate was 10 times the national average, and 40 percent of the native american people were below the poverty line.

i think the answer is   b.