A．A thief had abandoned it by the roadside.   
B．It had been towed away by the local police.    
C．The owner had forgotten where he had parked it.     
D．Someone had borrowed it from the owner's wife.

A．To lock up their garages where cars are kept at night. 
B．To lock up their cars wherever cars are kept. 
C．To park the cars in the garages at night.
D．To keep their cars in locked garages.

A．Methods people use to eliminate distractions.
B．The area of the brain responsible for blocking distractions.
C．The usefulness of questionnaires in assessing distractibility.
D．Research about how the brain deals with distractions.