Serena and Norah are colleagues in an advertising firm. Norah has the same qualifications as Serena and puts in more visible effort into her work than her colleague. However, Norah finds out that Serena earns more money than her and also gets better benefits. This knowledge highly demotivates Norah, and her productivity reduces drastically. This scenario is reflective of the assumptions of _____. equity theory temporal motivation theory Theory Y Theory X