The correct answer is E.
The situation is a paradox because the action (sending a kindergarten enrollment letter) makes no sense given the reality (the recipient is 104 years old). We need to find the one explanation that makes this seemingly absurd event logical.
Let's look at why E is the best answer:
E. The computer system which sent the letter has only two digits for age.
This is the perfect explanation. If the computer system only stores two digits for age, it doesn't see "104". It only sees the last two digits: "04".
A 4-year-old is the exact right age to receive a kindergarten enrollment letter.
The automated system simply read "04", identified the person as a 4-year-old, and automatically sent the correct letter for that age group. The absurdity is resolved by a simple, logical technical error.
Why the other options are wrong:
* A. Two of the senior citizen's neighbors received a similar letter.
This just tells us the problem is widespread, but it doesn't explain why it's happening. It deepens the mystery rather than solving it.
* B. Kindergartens in the discussed state are mandatory for all those between 2 and 6 years of age.
This explains why a 4-year-old would get the letter, but it doesn't explain why a 104-year-old got one. It's irrelevant to the core paradox.
* C. The senior citizen in question had never been to kindergarten as a child.
This is just a piece of trivia about his life. It has zero connection to why he would receive a letter now.
* D. A new project encouraging senior citizens to teach and play with kindergarten children has recently opened in the neighborhood.
This is a tempting distraction, but the letter was for him to enroll (as a student), not to teach or volunteer. The letter was addressed to his parents, which reinforces the idea that the system thinks he's a child.
Bunuel
One of the residents of a senior citizens home is 104 years old. However, he received a letter addressed to his parents, asking them to enroll him in kindergarten for the following year.
Which of the following, if true, best resolves the above paradox?
A. Two of the senior citizen's neighbors received a similar letter.
B. Kindergartens in the discussed state are mandatory for all those between 2 and 6 years of age.
C. The senior citizen in question had never been to kindergarten as a child.
D. A new project encouraging senior citizens to teach and play with kindergarten children has recently opened in the neighborhood.
E. The computer system which sent the letter has only two digits for age.