women tend to use brain hemisphere(s) when performing verbal and spatial tasks, whereas men are more likely to use hemisphere(s) for each of these functions.

The correct answers are: both; one.

Answer 1: ​Women tend to use both their left and right brain hemispheres when performing verbal and spatial tasks. An explanation for this is possibly that women have a larger corpus callosum than men do. The corpus callosum refers to the bundle of nerves that connects the left brain hemisphere to the right brain hemisphere and transmits messages between both brain hemispheres.

Answer 2:  Men are more likely to use one hemisphere when performing verbal and spatial tasks. Research indicates that men's brain functioning shows more asymmetry in functioning wherein one brain hemisphere (usually the left) shows more activity when performing tasks of different natures. This is likely because men have a smaller corpus callosum and less transmission of messages between both brain hemispheres.