The set of values of $m$ for which $mx^2 - 6mx + 5m + 1 > 0$ for all real $x$ is (A) $m < \frac{1}{4}$ (B) $m \geq 0$ (C) $0 \leq m \leq \frac{1}{4}$ (D) $0 \leq m < \frac{1}{4}$
The set of values of $m$ for which $mx^2 - 6mx + 5m + 1 > 0$ for all real $x$ is\\
(A) $m < \frac{1}{4}$\\
(B) $m \geq 0$\\
(C) $0 \leq m \leq \frac{1}{4}$\\
(D) $0 \leq m < \frac{1}{4}$