Definition: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
Input: 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

Option E