Answer:
To allow air to enter into the bag and provide air and breathing room for the vegetables.
I think it was two weeks if it’s the same thing I remember. I’m not 100% sure
Given the attitude of the grandfather portrayed in the problem, the most likely answer is
B) Go to the doctor regularly because he can monitor his health before problems get severe.
This would be because you are reminded, "prevention is the best medicine", and the answer B provides the precaution that is recommended.