Types of political, economic and competitive challenges MTVnetworks international face

In a market economy, supply and demand are important because theya. (i) play a critical role in the allocation of the economy's scarce resources.b. (ii) determine how much of each good gets produced.c. (iii) can be used to predict the impact on the economy of various events and policies.d. all of (i), (ii), and (iii) are correct.