20. What does the phrase "over-driving headlights" mean?
a. the headlights are out of adjustment because they are aimed too low
b. the headlights are out of adjustment because they are aimed too high
(c.) inability to stop within the distance illuminated by the headlights
C. When road 6 (d) all of the ab
24. It your right fre driving, the ve
a. pull to th
(b.) pull to
c. slow
d. give
d. you have been driving with your headlights on for an extended period of time

Step 1 ：Analyze the given options for the meaning of the phrase 'over-driving headlights':

Step 2 ：a. the headlights are out of adjustment because they are aimed too low

Step 3 ：b. the headlights are out of adjustment because they are aimed too high

Step 4 ：c. inability to stop within the distance illuminated by the headlights

Step 5 ：d. you have been driving with your headlights on for an extended period of time

Step 6 ：Choose the most appropriate option, which is c. inability to stop within the distance illuminated by the headlights

Step 7 ：\(\boxed{\text{c. inability to stop within the distance illuminated by the headlights}}\)