The correct answer is C.
Economic goods are all commodities that are limited in quantity as compared to their demand. This means that there is not enough of the good to satisfy everyone who wants it. As a result, people have to make choices about how they will allocate their limited resources to acquire the goods they want.
Option A is incorrect because it refers to commodities that are available according to their demand. This would mean that there is always enough of the good to satisfy everyone who wants it. However, this is not the case for most goods, as they are limited in quantity.
Option B is incorrect because it refers to commodities that are available more as compared to demand. This would mean that there is more of the good than people want. However, this is not the case for most goods, as they are limited in quantity.
Option D is incorrect because it is not a valid option.