PT 14 S3 Q2

   It is a fundamental tenet of geophysics that theEarth's magnetic ... ...

The author's objection to the second hypothesis discussed in the passage is most applicable to which one of the following explanations concerning the extinction of the dinosaurs'?
(A) The extinction of the dinosaurs was the result of gradual changes in the composition of the Earth's atmosphere that occurred over millions of years.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: Science & Technology Mix 1