A、Because he thought the job was boring. B、Because his health got poor. C、Because he wanted to enjoy his life with his family. D

M: My grandfather looked forward to retirement, so that he would be able to spend his remaining years enjoying his life with the family. He retired at 65, but died at 68. He only enjoyed his retirement for three years. What a pity!
W: The next generation has begun to look at retirement a little differently. Why limit that last "vacation" to just a few years and to a time when your health might be too poor to let you do all the things you’ve planned to do? They are determined to alter that fate.
M: Do they have any way to lengthen their period of retirement?
W: They have a simple solution. Just retire earlier. Don’t wait until age 65. Retire at 50. You will be able to enjoy life after retirement for 15 or 20 years. This is a nice strategy, but there are still some problems.
M: What are they?
W: First, quitting work at 50 deprives you of 15 of your most productive years, and you accumulate less money to support yourself in retirement. Second, you are not going to die at 68, you are likely to live longer. It means your money must last you longer.
M: Do you mean that to retire earlier than scheduled is not a good solution?
W: In fact, because of these reasons, retirement as you know will not even exist.
M: How can you say that?
W: This sounds both horrifying and incredible. However, it’s a natural evolution of society. Because what many retirees discover after a while is that they’ve become just bored. Going to work can solve that problem. Work can be mentally challenging and stimulating, and lots of fun, especially you know you’re doing it because you want to, not because you have to.