Why was placer mining the most widely used method of mining for gold?

(1 point)
Responses

Placer mining was affordable to a large number of prospectors.
Placer mining was affordable to a large number of prospectors.

Placer mining required cooperation between miners and traders.
Placer mining required cooperation between miners and traders.

Placer mining was practiced by both Chinese and Native American miners.
Placer mining was practiced by both Chinese and Native American miners.

Placer mining gave miners the best chance of striking it rich.
Placer mining gave miners the best chance of striking it rich.