Final answer:
In mathematics, if you are in disorder or confusion, it means you are 'at' the numbers 9 and 13. Correct option is c.
Step-by-step explanation:
In mathematics, if you are in disorder or confusion, it means you are 'at' the numbers 9 and 13 (option c) in this case. The question is asking which numbers represent disorder or confusion.
The statement 'One out of seven' suggests that there is disorder or confusion, and the numbers 9 and 13 satisfy this condition.