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Which of the following performers applied earl scruggs banjo technique to the dobro josh graves tony trishchka jerry douglas bela fleck

The caves at lascaux were closed in 1963 because a. vandals were destroying the paintings b. the collective breath of the many visitors caused the paintings to corrode c. the weather was destroying the paintings d. the government of france wanted scholars to be able to study the work without distraction

Which does the author mean by " nature had to kindle all the fires, for man by his own effort was unable to produce a spark