It ran resources place to place way faster than horse and buggy.
Answer:
I think it’s b or c.
Explanation:
I mainly think it’s b. Not sure.
Answer:
He wants to invest in equipment to mine more diamonds to sell.
Explanation:
It makes more sense to me, personally, but if he wanted to sell more diamonds which is lots of money he could get more equipment to be better efficient. If he sold equipment as well he'd be putting himself out of business by giving his customers the chance to get diamonds themselves. Hope this helps :)