33) B
We need to identify a statement which can prove or say that roads are getting safer.
A – Wrong
This does not prove that roads are safer.
B – Wrong
Mentioned in the article already.
C – Wrong
This does not prove that roads are safer.
D – Correct
This allows us to trust the statistics provided in the text. This proves that roads are becoming safer.
E – Wrong
Mentioned in the article already.