- ANegative, because the negative factors outnumber the positive ones.
- BZero, because the negatives cancel each other.
- CPositive, because the number of negative factors is even.
- DIt cannot be decided without multiplying it out.
Step-by-Step Solution
Count the negative factors — −3, −7, −5 and −1 — which is four, an even number, so the product is positive. (It happens to be 210, but you never needed that.) Whether the negatives outnumber the positives is irrelevant; only the odd-or-even count of negatives decides the sign, and cancelling in pairs gives +1 each time, never 0.
Answer: C) Positive, because the number of negative factors is even.