You wish to measure the distance on a Mercator chart between a point in latitude 42°30'N and a point in latitude 40°30'N. To measure 30 miles at a time you should set the points of the dividers at __________.

A
41°15' and 41°45'
B
41°45' and 42°15'
C
42°15' and 42°45'
D
42°00' and 42°30'
E