To determine the sign of the product \(-38 \times -123\):
- Both factors are negative.
- The rule of signs states that the product of two negatives is positive.
Therefore, the answer to the first question is:
Positive - If the signs of the factors are the same, the product is positive.
Now, let's determine the product in simplest form:
\[ -38 \times -123 = 38 \times 123 \]
Calculating \(38 \times 123\):
\[ 38 \times 123 = 4674 \]
So, the product in simplest form is:
4674
Since this option is not listed in your provided responses, it appears there may be an error in the options given for the product calculation. If you meant \(1524\) as an option, it might be a typographical error, as the correct calculation yields \(4674\).