Answer:
C. 33%
Step-by-step explanation:
The frequency of the Kth most frequent word in a language is roughly proportional to 1/K of the most frequent word.
So the 2nd most frequent word is roughly proportional to 1/2 of the most frequent word
The 3rd most frequent word is roughly proportional to 1/3 = 0.333 = 0.33 of the most frequent word.
0.333 is rounded to 0.33 = 33%.
If it had been 0.335 or higher, it would be round to 0.34 = 34%.
So the correct answer is:
C. 33%