Concept:Significant figures ignore leading zeros in a decimal number.Explanation:The number is 0.0000407.The first significant figure is 4 and the second is 0.The next digit after these two significant figures is 7, which is greater than 5.So, increase the second significant figure from 0 to 1.Thus, 0.0000407 rounded to 2 significant figures becomes 0.000041.Answer:0.000041Correct option: C. 0.000041