19. According to the passage, what caused the value of C. gloriamaris shells to plummet?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

Located in the last paragraph (lines 80-83): Then in 1970, divers discovered the mother lode in the Pacific…the value of C. gloriamaris… plummet. Mother lode (parent mine) synonymous substitution A: where the shells were common;