It's (D). Invert the EXCEPT part to make this a strengthen CR. The answer is that US cars need better seat belts because staistically US drivers are more susceptiple to being involoved in an accident.
Still, it took 2:50 (too slow!)
Matt, inversion may not help always. No?
Here we need to identify a statement that is either strengthening, or irrelevant. Right?
The path is long, but self-surrender makes it short;
the way is difficult, but perfect trust makes it easy.