According to Cognitive Psychologists, the Pair of Activities That Most

According to cognitive psychologists, the pair of activities that most people would have trouble doing simultaneously is:

A) thinking about what to cook for dinner while combing one's hair.
B) watching the evening news on television while studying for an exam.
C) carrying on a conversation about the meaning of life while walking down the street.
D) mentally planning a weekend camping trip while jogging.