[Mark] Mark’s dorm begins to develop a pungent scent due to…

[Mark] Mark’s dorm begins to develop a pungent scent due to many late-night studying sessions. To address this, he decides to purchase a can of Febreze and sprays the entire bottle around his room. Despite this effort, the scent persists, and Mark starts looking for other, better solutions to eliminate the odor. What stage of the decision-making process is Mark in when he realizes that the Febreze didn’t work and he needs a better solution to his problem?