A scientist measures the growth of a bamboo plant over time. The table below shows the results.

Time (hours)
Height (cm)
10
1.2
20
1.5
30
1.8
40
2.1
50
2.4
60
2.8
What is the best inference for the height of the plant after 15 hours?

A. 1.35 cm
B. 1.20 cm
C. 1.50 cm
D. 1.55 cm