Answer:
b. They are treated differently because the loss in value of Carol's stock is the result of a sale, while the loss in value of Dave's stock is simply a decline in value.
Step-by-step explanation:
Although the stock owned by Carol and by Dave declines in value by $2,000, however Carol only has a realized and recognized loss of $2,000. The main factor in determining whether a disposition has taken place often whether an identifiable event has occurred. In the current scenario, Carol’s stock sale qualifies as a disposition and the Dave’s stock value decline does not qualify as a disposition and is simply a decline in value.