Ling is planning to travel to China to visit his parents during the winter holidays. Ling went to a travel agency called "Pan-Pacific Travel" to buy an airline ticket departing on December 16. Pan-Pacific Travel's sales representative handed Ling the standard sales agreement, told Ling to read it, and if acceptable, sign at the bottom. Ling didn't bother to read the agreement, just signed it and paid for the tickets. A few days later, Ling found out that due to an emergency at work he could not leave on Dec. 16. Ling called Pan-Pacific Travel and asked to change his flight date to the next day (December 17 instead of December 16). Ling was referred to the following term in the standard sales agreement: "All flight tickets are final and are non-refundable." Ling was told that his flight date could not be changed. Ling disagrees. He believes that the contractual term allows him to change his flight date.

A. By identifying and applying the appropriate law, make at least one argument why the flight date cannot be changed .

B. By identifying and applying the appropriate law, make at least one argument why the flight date can be changed .