Some monkey flowers (Mimulus guttatus) living near the sites of copper mines can grow in soil containing high concentrations of copper, which is toxic to most plants. Copper tolerance is a heritable trait.

Select the three statements that are true.

Copper contamination in the soil created copper-tolerant plants.
Nearly 100% of monkey flowers growing in copper-contaminated soil are copper tolerant.
The population that existed before mining must have included both copper-tolerant and copper-intolerant plants.
If you were to test monkey flowers growing on the shore of the lake, you would expect nearly 100% of them to be copper tolerant.
Natural selection favors copper tolerance in all soils near the old mine, not only in the contaminated soils.
Copper-tolerant plants are found only in contaminated soils.