Answer:
c. Go through the mail each day and sort it
Step-by-step explanation:
Betty receives the mail at 4pm every day and then places it on the counter. One of the simplest ways to reduce the 40 minute time period required for sorting the mail on Friday, Betty can simply go through the mail when she receives it and then sort it in that very moment. She can keep tabs of the sorted emails on daily basis and will then only need to file them on Friday without any additional time for sorting. It is often best to complete tasks in parts then accumulate the work first and then perform it as it can be stressful.