Which of the following is the basis for good scientific inquiry

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

What layer of the atmosphere is directly above the troposphere?

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