Which of the following sets is non-empty?
- A$A = \text{set of odd natural numbers divisible by } 2$
- B$B = \{x : x + 5 = 0, x \in N\}$
- C$C = \text{set of even prime numbers}$
- D$D = \{x : 1 < x < 2, x \in N\}$
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