Task: Question Answering
Input (English): Question: Look at this series: 0.15, 0.3, ____, 1.2, 2.4, ... What number should fill the blank?

 Option A: 0.7

 Option B: 0.2

 Option C: 0.4

 Option D: 0.1

 Option E: 0.6
Output (English): Option E