The answer is the last choice that is "None of these values will produce a mathematical error".
Explanation:
In this question, the above given choice correct because neither of the flowchart procedures could trigger a mathematical error. This error could not be induced by multiplication, addition and subtraction, and the only division by 15. It is the only divide by 0, that's why the above flowchart will produce a mathematical error.
I think it'd be terminal concentrator. A(n) terminal concentrator is a front - end processor that multiplexes the traffic from hundreds of remote terminals into one port on a large computer.