What was the most significant effect of the gold and silver boom on development in the west?
a.
most prospectors made large fortunes and established thriving communities.
b.
boom towns that went “bust” turned into ghost towns and population decreased in the west.
c.
a “population boom” accompanied the mining boom.
d.
most prospectors did not strike it rich and moved back east, depleting the west’s population.

While B is semi-correct, it is not the most siginificant effect. I do not find D to be true, either. I'm between A and C for this, since some textbooks emphasize different effects of events--do with that what you may :)

the answer is: must pay taxes on profits

since it is considered as a part of your income, profits from investments is eligible for tax payment.

the tax from your investment could be influenced by how long you decided to sell it. united states promotes keeping your investment for long term period. so, the tax rate for investments that you sell in less than one year is typically higher compared to investments that you sell in more than one year period.

mprove the economic conditions for farmers