Q: In this task, you need to provide the correct option for a given problem from the provided options.
Problem: the ratio of local and international calls made by amy this week is 5 to 2 . if the ratio changes to 5 to 3 after amy makes 3 more international calls , how many local calls did amy make this week ?
Options: a ) 3 , b ) 5 , c ) 10 , d ) 15 , e ) 21
A:
d