WOW - this is good. This is how I tackled it.
Let's split the question:
1.) LD to improve car efficiency increases production. If these figures are accurate then this is huge success.
2.) A brilliant mathematician claims, that however this could not true.
So, basically from the question - one claimed to increase something by so much. if the effort was correct then success. one expert says however ain't true. the erroneous pattern here (according to me), does not explain why the expert says that the claim cannot be true.
coming to ans:
a and b are clearly out.
c) amos claim to hold his breath, but an expert says he cannot = hold it (second suspect)
d) evelyn claims she came home before midnight, but robert who knows the time (but not an expert), said she did not = this kind off argument is not stated in the q/stem
e) moira reports lee won with adam's with a distant third, an expert says it cannot be possible. he does not say why it cannot be possible.IMO it is "E".
I'll wait for more explanations and OA.