Casimir purchased 1,000 shares in Course Developers for $10,000 on August 1, 2022. The company went bankrupt on May 11, 2023, with no hope of recovery for the shareholders. On what date is the stock deemed to be worthless and what is the nature of the loss?
a. December 31, 2022, short-term loss in 2022
b. December 31, 2023, short-term loss in 2023
c. December 31, 2023, long-term loss in 2023
d. May 11, 2023, short-term loss in 2023
