When an international team of scientists pumped a carbon dioxide and water mix into underground basalt rocks, basic chemistry took over. The acidic mixture dissolved rocks' calcium and magnesium and formed limestone. Basically carbon dioxide is converted into stone, exclaimed the scientists.

Which one of the following statements best reflects the most logical, rational and practical suggestion implied by the passage?

It is a cheap and practical method to produce limestone at commercial level for building purposes.

This can be used as one of the methods of carbon sequestration.

Basalt rock can be made a good source of calcium and magnesium minerals by this method.

Good rock-dissolving acid can be produced by mixing carbon dioxide and water.