Im also stuck on this im down to A and C
You should wear safety glasses, point test tube away from people, heat tube at an angle, etc.
I believe to make the most the producers can implement the following;
They can work to decrease their marginal cost, they can raise prices to increase marginal revenue, they can also keep the marginal cost below marginal revenues. The producers are the suppliers of various goods and services in the market according to the demand of the consumers. They determine the amount of goods in the markets.