Adelia drove from her house to townsville one evening. the diagram below shows the time adelia left home, the time she arrived in townsville, and the distance she drove.(time was about 6:27 and arrival was about 6:42 and the distance she drove was 180 miles) What was adelia's average speed? A. 30 miles per hour
B. 45 miles per hour
C. 60 miles per hour
D. 75 miles per hour