What incident in 1960 heightened cold war tensions between the u. s. and the soviet union?

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.

the answer should be a. the sui empire, the tang empire extended from korea in the west to manchuria in the east.