Final answer:
Curt subscribes to Theory X of motivation, which assumes workers are lazy and need to be controlled through punishments. Curt's reprimand and assignment of less appealing shifts to Kyle exemplify this theory.
Step-by-step explanation:
Curt subscribes to Theory X of motivation. Theory X assumes that workers are inherently lazy and unproductive and therefore need to be controlled and motivated through punishments. Curt's decision to reprimand Kyle and assign him to less appealing shifts, and potentially dock his pay, aligns with the principles of Theory X which aims to achieve goals through rules and punishments.