Refer to the data table below and answer the following question:
Measured on Birthday Height of the child (in cms)
4 100
5 105
6 115
7 120
8 125
9 130
10 135
11 140
12 145
13 150
14 155
15 160
16 170
What was the increase in the height of the child from the 10th Birthday to the 14th Birthday?

1. A
   25cms
2. B
   20cms
3. C
   30cms
4. D
   15cms