The number of phones sold per month by three salespeople for four different months is shown in the given graph. Based on the graph, which of the following is a true statement?
O The average number of phones sold by the three salespeople in December was 60 phones.
o The average number of phones sold by the three salespeople in September was 60 phones.
O The average number of phones sold by the three salespeople in October was 50 phones.
O The average number of phones sold by the three salespeople in November was greater than the average
number of phones sold by the three salespeople in October.