One of the biggest threats to a company’s productivity is absenteeism. Studies have shown that companies with in-house childcare programs see fewer absences among their employees who are parents than companies without such programs. Therefore, many companies could boost their productivity by starting in-house childcare programs.
Which of the following, if true, most weakens the above argument ？（）
A. Companies that reimburse outside childcare programs actually see less absenteeism among working parents than companies with in-house programs.
B. In-house childcare programs create distractions for nonparents that can harm their productivity.
C. Absenteeism is not a serious problem for companies that impose harsh penalties on employees who miss work.
D. Studies have shown that employees with children are more likely than those without children to remain in the same job for more than five years.
E. Potential employees generally view companies with in-house childcare programs as more desirable places to work than companies without such programs.