Can someone help me solve those pleasee

Iknow #2 is d. i just need to know why

Miner's coal distributors does not mine coal itself, nor does it even store or handle the coal. instead, miner's solicits orders for low sulfur coal from other firms, then purchases the required amount from suppliers and directs them to ship the coal to its customers. what is miner's

Displacement is the slope of a velocity vs. time graph a. true b. false