Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next? Choose the correct choice from the following answers:
A) 4.2 B) 4.4 C) 4.7 D) 5.1 E) 1.2
Answer: Option 4.7   In this simple addition series, each number increases by 0.8.
<result>C</result>
Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?