Using cell phones while driving increases the number of accidents because use of the phones requires:

• A. less reaction time, making drivers respond faster to hazards
• B. increased physical strength, which most drivers lack
• C. divided attention, which reduces the driver's ability to focus on the road
• D. improved vision, which is not affected by phone use

Answer: (C)

Verified step by step guidance

1. Identify the key concept in the problem, which is how using cell phones while driving affects driving performance.
2. Understand the term 'divided attention' in psychology: it refers to the ability to process different information sources or perform multiple tasks simultaneously, which can reduce focus on any single task.
3. Recognize that using a cell phone while driving requires the driver to split their attention between the phone and the road, leading to decreased focus on driving tasks.
4. Evaluate the other options given: less reaction time (which would mean faster responses), increased physical strength, and improved vision, and consider whether these logically relate to phone use while driving.
5. Conclude that the correct explanation is 'divided attention,' as it best describes how phone use impairs the driver's ability to concentrate on driving, increasing accident risk.