The conclusion that can be drawn from something although it is not explicitly stated.
Answer:
While we are gone, please walk the dog.
Please walk the dog, while we are gone.
The answer is: The wreck created a traffic hazard flares were put up.
B. Had dried; it says 'before the rain STARTED', indicating past tense.
D. Spoke; also past tense.
A. Has written; 'needS, not needED.