A class receives the following source set for a synthesis essay. Issue: Should factories fund paid apprenticeships for local high school graduates? Source A reports that paid apprenticeships let graduates earn wages while learning technical skills. Source B warns that training apprentices requires mentors and slows some production tasks. Source C argues that local employers can build a workforce familiar with their equipment and safety culture. Source D recommends rotating mentors and partnerships with technical colleges. Source E notes that the proposal works best when rotating mentors and partnerships with technical colleges are treated as part of the plan rather than as an afterthought. Which thesis would best guide a focused, evidence-based essay?