Detailed Instructions: In this task, you need to provide the correct option for a given problem from the provided options.
Problem:Problem: a college has classes from 10 : 00 am until 1 : 40 pm . in this duration , there are 5 periods . if 5 minutes are provided between each period to leave one class and enter the next class , how many minutes long is each period ? 
Options: a ) 38 min , b ) 41 min , c ) 40 min , d ) 42 min , e ) 52 min
Solution:
c