The first day, Brian saw 31 birds and twice as many squirrels as birds. The
second day, Brian saw 20 birds and 42 squirrels. Which of the following is a
good estimation of how many birds and squirrels Brian saw in the two days?
A. 110 birds and squirrels
B. 150 birds and squirrels
C. 190 birds and squirrels
D. 230 birds and squirrels
E 270 birds and squirrels