Final answer:
The time to mentally solve the multiplication depends on the complexity of the numbers, but for typical cases, it would likely be A. Less than 1 minute.
Step-by-step explanation:
The time required to mentally solve a multiplication depends on factors such as the complexity of the numbers involved, the mental calculation skills of the individual, and their familiarity with multiplication techniques.
For relatively straightforward multiplication, such as two single-digit or two-digit numbers, it's reasonable to expect it would take less than a minute for most people with average mental calculation abilities. If the numbers are larger or involve more complex digits, the time might extend into the 1-2 minute range. However, if the numbers are exceptionally large or the multiplication is complex, it could take more than 3 minutes.
Therefore, the appropriate answer would depend on the specifics of the multiplication problem in question and the individual's mental calculation proficiency.