Final answer:
The exponent that would produce the smallest possible positive number for the given mantissa 100000 is option B.0000.
Step-by-step explanation:
The exponent that would produce the smallest possible positive number for the given mantissa 100000 is option B.0000. The mantissa 100000 can be represented as 1 x 10^5. If we have an exponent of 0, the number becomes 1 x 10^0 which is equal to 1. Therefore, option B produces the smallest possible positive number.