15. Inter-sectoral adjustment refers A. adjustment across sectors according to the relative mix of inputs used in production, and is primarily associated with the exploitation of economies of scale. B. adjustment within sectors according to the relative mix of inputs used in production, and is primarily associated with specialization according to comparative advantage. C. adjustment within sectors and is primarily associated with economies of scale. D. adjustment across sectors according to the relative mix of inputs used in production, and is primarily associated with specialization according to comparative advantage