Which one of the following would cause a rightward shift of the supply curve? (a) A new tax is imposed on production of goods

The correct answer is (c) Firms producing goods find ways of lowering their production costs.

Some of the factors that would cause a shift in the supply curve are a change in the number of suppliers, expectations, weather, input prices, and technology. Technology can help to boost the efficiency of production. An increase in efficiency is related to a cost reduction. Therefore, firms could be able to produce more at the same cost. This leads to shift the supply curve to the right. In contrast, a tax imposition is related to a leftward supply curve shift. Fewer firms in the market also shift the supply curve to the left. An increase in demand will only cause increased prices.