The domain of the function f (x) = [Log₁₀ (5x-x² / 4 )]¹/² is ____

A. - [infinity] < x < [infinity]
B. 1 ≤ x ≤ 4
C. 4 ≤ x ≤ 16
D. -1 ≤ x ≤ 1