The correct answer for this one is C. The review question needs to be more specific, and option C is the best reasonable answer for this question.
First of all, since this is a math question, you should post this in the Mathematics section.
Secondly, call the smaller digit x - clearly, then, the larger digit is x+8. We know x is at least one, and x+8 is at most 9 (since otherwise x+8 would not be a digit). If x is greater than one, x+8 will be ten or more, but x cannot be less than one, so x must be one. As a result, our number has a tens digit of 1+8=9, so the number is 91.
Answer:
10- Oxymoron
The words "safety" and "hazard" are right by each other and those are complete opposites so that is an oxymoron.
11- alliteration
The use of the b's at the beginning of a lot of the words is alliteration because it is the repetition of a similar sound at the beginning of the word. The only other one that it could be is consonance because consonance also repeats a sound, but only consonants and it is usually at the end of the word. Even though b is a consonant, I don't think it is consonance because the repetition appears at the beginning of the word.
12- Anaphora
This is anaphora because the word "singing" is being repeated in most of the clauses in order to place emphasis on it.
Probably chronological order