According to Passage 1. why do geologists use gravity meters?

(A) to observe the bottom of the ocean
(B) to remove oil samples from the ocean
C
to create maps of what is hidden under the ocean
to tell the difference between water and oil under the ocean

Which statement is true about the theme of a short story? a. the theme is directly stated in the story. b. the theme is the message the author wants to convey. c. the theme is the purpose of the story. d. the theme is the same as the subject of the story.