Concept:The mean is found by dividing the sum of all values by the number of values.Explanation:The given numbers are 2, 5, 2x, and 7.The mean is less than or equal to 5.So, 42+5+2x+7≤5.Simplify the numerator: 2+5+7=14.Thus, 414+2x≤5.Multiply both sides by 4: 14+2x≤20.Subtract 14 from both sides: 2x≤6.Divide both sides by 2: x≤3.Answer:x≤3, so the correct option is A.