Li, the President of Lavender Inc

Li, the president of Lavender Inc., believes that when employees are trained, they should work on one particular task till they know how to perform it perfectly.Thus, the employees are usually encouraged to repeatedly perform their designated tasks.Li claims that the more an employee engages in a particular task, the more skilled he or she will become at it.Which of the following statements strengthens Li's belief?

A) Employees will feel a sense of job dissatisfaction and will lose their overall enthusiasm for their jobs.
B) The work of employees will speed up while compromising their attention to detail.
C) This method of training requires a lot of time, effort, patience, and finances.
D) Employees will find better ways at completing the same task.