How and why did different systems of governance develop in various Chinese dynasties as a method of responding to the issues that faced the region at the time

Tang and song dynasties were Bureaucracy which is a system of government where the important decisions are made by state officials

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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.

probally   a few days after there called