Which of the following statements represents an opinion?

Question

Quizplus · Accepted Answer

This is an opinion. It includes the word "best", and cannot be proven with research. Additionally, what may be the "best" for someone, may not be the "best" for someone else. 
The mountain range lasts for 68 miles is incorrect. This is factual information that can be proven with research. It is specific in nature and does not express opinion. 
A steady exercise routine can decrease the risks of cardiac disease by 20 percent is incorrect. This is factual information that can be proven with research. It is specific in nature and contains a statistic.
Lawyers usually intern as a clerk after graduating law school is incorrect. This is factual information that can be proven with research. It is specific in nature and does not contain an opinion.

Which of the Following Statements Represents an Opinion