Suppose a person buys a share of stock for $10. The day before the person dies, the stock is worth $20, as it is the day after the person dies. If the stock were sold the day before the person died, the basis would be _____; if the stock were sold the day after the person died, the basis would be _____, assuming earnings on assets are taxed as they are in the current U.S. system.
a. $10; $20
b. $10; $0
c. $20; $10
d. $20; $0