Solution

The correct answer is (A) and (C) Only

EXPLANATION:

• (A) ∀n(n² ≥ 0):
  • This statement is true because the square of any integer is always greater than or equal to zero.
• (B) ∃n(n² = 2):
  • This statement is false. No integer squared equals 2.
• (C) ∀n(n² ≥ n):
  • This statement is true for all integers because the square of any integer is greater than or equal to the integer itself.
• (D) ∃n(n² < 0):
• This statement is false because the square of any integer cannot be less than zero.

So, the correct option is: (A) and (C) Only.