If the value range of function y = LG (x2 + 2x + m) is r, then the value range of M is () A. m＞1B. m≥1C. m≤1D. m∈R

The value range of ∵ function y = LG (x2 + 2x + m) is r, ∵ f (x) can be obtained by taking all positive numbers, ∵ ≥ 0 ∵ 0 ∵ 0 ∵ 4 m ≥ 0, and the solution m ≤ 1

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