Which of the following is likely to be an important economic activity in an elongated country with an ocean as its longest physical border?

A. Mining
B. Farming
C. Tourism and service
D. Fishing
E. Manufacturing

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted