The compound word" quick-fix" ( Line 2, Para.1 ) is closest in meaning to ______.

A．deploy sophisticated facilities on the interstate highways
B．provide passenger vehicles with a variety of services
C．optimize the highway capabilities
D．improve communication between driver and the people who monitor traffic

A．use the method of scientific investigation in daily life
B．are not far away from obtaining the scientific skills
C．have to face bravely the obstacles in the academic field
D．are capable of overcoming the difficulty in science work