57 The function f is defined as f(x) = x² + 1, where -2 ≤ x ≤1. What is the full range of f? A B C D E f(x) ≥ 1 1≤ f(x) ≤2 1 ≤ f(x) ≤4 1 ≤ f(x) ≤ 5 2 ≤ f(x) ≤5 V -2≤x≤1 1