found a less expensive way to mine and process diamonds. manufactured artificial stones that resemble diamonds. reduced the price of diamonds in order to sell more. started providing small diamonds instead of large ones.
I gave my students this multiple choice question: Below is an advertisement found in a local newspaper. As shiny as diamonds at a fraction of the price! Buy "Simu-Gems" at Cost-Rite Jewelers. This advertisement suggests that Cost-Rite Jewelers' supplier

Only one answer is correct among these 4 choices:
- found a less expensive way to mine and process diamonds.
- manufactured artificial stones that resemble diamonds.
- reduced the price of diamonds in order to sell more.
- started providing small diamonds instead of large ones.

Could you tell me which one is correct?

manufactured artificial stones that resemble diamonds.