The correct answer is B, editing and proofreading. The word "proofread" literally means to scan the document in search for mistakes in grammar, spelling, etc. When you're "drafting", you're not thinking about those things, the most important thing is to think of a subject to write about. Proofreading is very important when it comes to these things.
Evidence: According to media it states that wearing a mask helps as a simple barrier to help prevent respiratory droplets from traveling into the air and onto other people.
