http://classic.7sage.com/lsat_explanations/lsat-19-section-4-question-09/

While I was solving this, I narrowed the choices to B or D.

B because it provides an alternate explanation for why Uranus is being pulled away;

D because if the Sun exerts less of a pull on Uranus, maybe even the little mass that Neptune and Pluto have can pull Uranus towards them? Hence, an alternative to the existence of another planet.

Please explain to me what the correct thought process for eliminating D is.

Thank you :)

http://classic.7sage.com/lsat_explanations/lsat-20-section-4-question-03/

Hi! Please find below the way I solved the question:

Opponents Conclusion: triple trailer trucks (ttt) are more dangerous than other commercial vehicles

Premise: Where ttt are permitted, for these vehicles the rate of road accident fatalities per mile is lower than the national rate for other commercial vehicles

Conclusion: ttt are safer than other commerical vehicles

A) Irrelevant

B) Provides an alternate explanation for why the rate of accident fatalities is lower, thus, weakens

C) So what if they oppose everything

D) In some way supports our argument as it says they require a special license thus even safer drivers drive ttt

E) Irrelevant fact

Is my trail of thought correct?

Thanks for your help!

Hi JY! I don't quite understand this answer choice as I eliminated option A and B as they mention water levels - which aren't specifically addressed by the passage. Could you please help me out with an explanation for this?