In which of the following ways does international trade act as an engine of growth ?(a) Motivate the specialisation(b) Benefits of division of labour(c) Benefits of price unequalisation(d) Availability of commodity at reasonable rates.Which of the statements given above is/are correct ?

• A. (a) only
• B. (a) and (b)
• C. (a), (b) and (c)
• D. (a), (b) and (d)