Objective: Prevent acne on face.

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- Change pillow case every night.
- Change pillow case every month.
Change pillow case every night.
Mål: Förhindra akne i ansiktet. Vilka av följande lösningar är mer sunda i termer av naiv fysik resonemang? - Byt örngott varje kväll. - Byt örngott varje månad.
Goal: Prevent acne on the face. Which of the following solutions are more sound in terms of naive physics reasoning? - Change pillowcases every night. - Change pillowcases every month.
Byt örngott varje kväll.
Change pillowcases every night.