### Instruction: Look at this series: 1.5, 2.3, 3.1, 3.9, ... What number should come next?
Answer Choices: (A) 4.2 (B) 4.4 (C) 4.7 (D) 5.1 (E) 1.2.### Response: Let's solve the multi-choice question step by step.
The answer is Option C
In this simple addition series, each number increases by 0.8.