Which of the following is a problem associated with hands-free devices? a. they cause drivers to fixate on the car in front of them. b. they require extra attention due to poor reception. c. they use a number of small, hard-to-reach buttons.

The correct answer is option B, that is, they require extra attention due to poor reception.

The hands-free devices have an issue, as it can lead to mishaps. When a person tries to focus on more than one activity, the brain may become burdened by the requirement to process information from two or more sources.

Additionally, whenever a person switches between the errands, the brain must devote energy and time redirecting its attention rather than thinking. The more information the brain has to sort at a particular time, the more probability is to suffer from inattention blindness and miss essential clues about the situation of the road.

Thus, to be a safe driver, there is a need to develop mental discipline to remain aimed at a single task as long as the person is driving on the road.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands