With no explanation, chose the best option from "A" or "B". Louisa has been coughing and sneezing for the past few days, and she thinks she might have Covid-19. Louisa needs to go shopping at the grocery store.

A: Louisa decides to quarantine herself and stays at home until she feels better.
B: Louisa doesn't wear a mask and coughs while inside the grocery store.
A.