For some employers the policy of lifelong employment is particularly important because it

For some employers, the policy of lifelong employment is particularly important because it means that they can put money and effort into their staff training and make them loyal to the company. What they do is to select young people who have potential and who can be trained. They then give the young people the kinds of skills that will make them suitable employees for the company. In other words, they adjust their training to their particular needs.

One recently employed graduate says that she is receiving a great deal of valuable training from the company. "This means that I will be a loyal employee", she says. "And it also means that the company will want to keep me. I am an important investment for them. So the policy is a good one because it benefits both the employer and the employee".

Recently, however, attitudes towards lifelong employment are beginning to change. Employees are slowly beginning to accept the idea that lifelong employment is not always in their best interest and that changing firms can have career advantages.

The purpose of lifelong employment is to ______.

A．adjust the needs of the company to its employees

B．make employees loyal to their company

C．select the best skilled young employees

D．keep the skilled staff satisfied

请帮忙给出正确答案和分析，谢谢！