Which of the following statements regarding flexible pavements is most correct? Question 1Select one: A. The combination of gravel subgrade, concrete base, and bituminous cover provide a flexible design able to cope with varying moisture conditions. B. The combination of materials and placement mean that these roads are flexible in design, handle varying moisture, and can be utilised soon after construction. C. The combination of aggregate subbase, concrete base, and asphaltic cover provide a flexible and durable design. D. The combination of materials and placement provide flexibility in different moisture conditions but they can be costly to repair