Which of the Following Is an Example of Arbitrage

Multiple Choice

Which of the following is an example of arbitrage?

A) An inventor of a new hydrocarbon cracking technology based on palladium buys this metal knowing that its price will rise when the technology is adopted.
B) A metals merchant is offered $108,000 in one year for $100,000 of palladium today,when the interest rate is 10%.
C) An investor,seeing that the price of palladium on the metals exchange in two different countries is slightly different,buys on one and sells on the other to make a profit.
D) A firm buys $250,000 of palladium today,with an option to sell it at $275,000 in one year if interest rates rise above 10%.
E) An investor buys palladium today hoping the price will increase and it can be sold for a profit.