A real number ‘a’ is called a good number if the inequality (2x2 – 2x – 3) / (x2 + x + 1) ≤ a is satisfied for all real x. What is the set of all real numbers?

• A. (-∞, 10/3]
• B. (10/3, ∞)
• C. [10/3, ∞)
• D. [-10/3, ∞)