Task: Question Answering
Input (English): Question: For positive integers n, the integer part of the nth term of sequence D equals n, while the infinite decimal part of the nth term is constructed in order out of the consecutive positive multiples of n, beginning with 2n. For instance, D_1 = 1.2345678…, while D_2 = 2.4681012… The sum of the first seven terms of sequence D is between:

 Option A: 28 and 29

 Option B: 29 and 30

 Option C: 30 and 31

 Option D: 31 and 32

 Option E: 32 and 33
Output (English): Option C