Finish the following sentence with the best choice: How do I grind the concrete properly when making a concrete countertop>

Choices:
- keep your grinder as flat as possible on the surface, especially with the rougher grit pads. . Continue grinding until you have the desired marble exposed
- keep your grinder as flat as possible on the surface, especially with the rougher grit pads. . Continue grinding until you have the desired aggregate exposed

Answer:
keep your grinder as flat as possible on the surface, especially with the rougher grit pads. . Continue grinding until you have the desired aggregate exposed