Which of these physical skills typically develops LAST?

Hal and Darcy endured many stressful years in their marriage resulting in much unhappiness. Over time, their marriage rebounded and improved. Research indicates that

A. once both spouses realize they would be alone without each other, marriages improve. B. stress may motivate couples to work together. C. divorce is not financially feasible for many couples. D. learning to understand and forgive each other promotes happiness.

Sometimes a person's corpus callosum is split, which separates the two hemispheres completely. This is done to

A) study the effects of a split brain. B) change a person's personality. C) determine the precise area of cognitive functioning. D) control epilepsy.