If 0 < x < 1, which of the following expressions has the greatest value?

✓ Correct Answer: Option D

When 0 < x < 1, squaring x (x^2) makes it smaller than x, and taking the square root of x (√x) makes it larger than x. However, 1/x will be greater than 1, making it the greatest value. For example, if x = 0.5, then x^2 = 0.25, √x ≈ 0.707, and 1/x = 2.