[单项选择]Placing a human being behind the wheel of an automobile often has the same curious effect as cutting certain fibers in the brain.
The result in either case is more primitive behavior. Hostile feelings are apt to be expressed in an aggressive way.
The same man who will step aside for a stranger at a doorway will, when behind the wheel, risk an accident trying to beat another motorist through an intersection. The importance of emotional factors in automobile accidents is gaining recognition. Doctors and other scientists have concluded that the highway death toll resembles a disease epidemic and should be investigated as such.
Dr. Ross A. Mcfarland, Associate Professor of Industrial Hygiene at the Harvard University School of Public Health, said that accidents "now constitute a greater threat to the safety of large segments of the population than diseases do."
Accidents are the leading cause of death between the ages of 1 and 35. About one third of all accidental death
A. the highway death toll resembles a disease epidemic
B. the highway death toll is entirely due to emotional factors
C. many drivers have a disease of the brain
D. highway accidents should be treated as disease epidemics

Placing a human being behind the wheel of an automobile often has the same curious effect as cutting certain fibres in the brain.
The result in either case is more primitive behaviour. Hostile feelings are apt to be expressed in an aggressive way.
The same man who will step aside for a stranger at a doorway will, when behind the wheel, risk an accident trying to beat another motorist through an intersection. The importance of emotional factors in automobile accidents is gaining recognition. Doctors and other scientists have concluded that the highway death toll resembles an epidemic and should be investigated as such.
Dr. Ross A. McFarland, Associate Professor of Industrial Hygiene at the Harvard University School of Public Health, said that accidents “now constitute a greater threat to the safety of large segments of the population than diseases do. ”Accidents are the leading cause of death between the ages of 1 and 35. About one third of all
A. a gentle man can change into a rude driver
B. it’s difficult for a driver to control himself when behind the wheel of an automobile
C. to drive has been a way for some drivers to express their hostile feelings
D. the emotional factors have been the leading cause of automobile accidents