How is the study of the earths interior an example of indirect observation

Eating while you drive a.increases your risk of being involved in a collision b.is only risky with heavily packaged foods c.should only be done with food that can be handled easily

Laugh and be merry, remember, better the world with a song,    better the world with a blow in the teeth of a wrong.    laugh, for the time is brief, a thread the length of a span.    laugh and be proud to belong to the old proud pageant of man. (laugh and be merry/john masefield/public domain) which of these is the main idea of the poem?

Apolitical campaign showing the candidate wearing a hard hat and work shirt while touring a factory is using oa) glittering generalities. ob) transfer appeal. oc) testimonial. od) plain folks appeal.