Vаlоrа hаs wоrked at a paper mill cоmpany for the last 2 years as a front desk receptionist. Her co-worker, Dalton, has a very short temper while reading emails and blows up very quickly when he receives an email that critiques his work performance in any way. One day while both Valora and Dalton are working at the office, Dalton receives an email that criticizes him for not reaching his quota during the last quarter. Dalton becomes enraged and yells multiple racial and homophobic slurs at his coworkers, including Valora. Valora is so hurt by the language Dalton used that she resigns on the spot. Which court case in the readings would prevent Valora from suing her employer under a Title VII violation for Dalton's actions?