Finish the following sentence with the best choice: To prevent soap scum in the shower,

Choices:
- scrub the shower walls at least twice a year with a scrub sponge and soap scum remover.
- scrub the shower walls at least twice a week with a scrub sponge and soap scum remover.

Answer:
scrub the shower walls at least twice a week with a scrub sponge and soap scum remover.