Which is correct? a. some lakes in banff national park in the canadian rockies appear bright turquoise in sunlight. because they contain very fine dust from rocks crushed by glaciers. b. some lakes in banff national park in the canadian rockies appear bright turquoise in sunlight because they contain very fine dust from rocks crushed by glaciers. c. some lakes in banff national park in the canadian rockies appear bright turquoise in sunlight, because they contain very fine dust from rocks crushed by glaciers.