The graph below shows the number of patents granted to four Turkish scientists between 2010 and 2020.
According to the graph, which scientist had the highest increase in patents from 2015 to 2020?
A)Dr. Ayşe (from 5 to 12, 7 more)
B)Dr. Mehmet (from 12 to 15, 3 more)
C)Dr. Elif (from 3 to 7, 4 more)
D)Dr. Can (from 8 to 10, 2 more)