In a week, an airline operates a flight from San Francisco to New York once a day. The total travel times for this week are:

Sunday: 343 min.
Monday: 314 min.
Tuesday: 401 min.
Wednesday: 341 min.
Thursday: 359 min.
Friday: 407 min.
Saturday: 378 min.

What was the range of flight times for the route that week?

a. 66 min
b. 93 min
c. 29 min
d. 87 min