Answer:
D, If you buy two new games, your opportunity cost is the time you could spend talking on the phone.
Explanation Opportunity cost is the value of the next best thing you give up whenever you make a decision. In this case the opportunity cost of buying the two games is the time you could be using the phone.
The Tang rulers established a system of coinage. This was an accomplishment by the Tang Dynasty of China.
The system of coinage began in Tang dynasty and continued its existence in the succeeding dynasties.
Kai Yuan Tong Bao was written in character on the coin currency circulated all throughout China beginning on the Tang dynasty. <span>Kai Yuan Tong Bao's size, weight and the accordance of name with the form made it not only the main currency of the Tang Dynasty but also the norm of the coin in the next dynasties</span>.
Since it was minted during the Tang dynasty, it was used without discontinuity. Its usage even extended to the collapse of the Tang dynasty. This form of money was used for 1300 years before replaced by Hong Xian Tong Bao.
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The main reason why Congress passed the Indian Removal Act in 1830 was "<span>b. to move eastern Indian tribes to lands west of the Mississippi," since the goal was to clear this land for white settlement. </span>