A cryptographer has intercepted an enemy message that is in code. He k

Which of the following would be the least helpful in breaking the code?
The problem arises what to substitute after 26 therefore keeping that in my mind let us go for the hunt

(A) Knowing the frequency with which the vowels of the language are used
what happens if there are words appear without vowel what will we do then, like sky , fly therefore it's useless therefore out

(B) Knowing the frequency with which two vowels appear together in the language
Similar reasoning as A if the code is a non-vowel word we might never be able to figure out therefore out

(C) Knowing the frequency with which odd numbers appear relative to even numbers in the message
This will definitely help us after the intial 26 number substituting what kind of pattern to follow to figure out the right answer therefore let us hang on to it

(D) Knowing the conjugation of the verb to be in the language on which the code is based
a mood of language will not help us effectively understand the code hence we safely eleminate

(E) Knowing every word in the language that begins with the letter R
i see no useful reason for following the above method therefore out

THerefore IMO C