Correct option is D
The correct answer is
(d) A quantity too small to make an impact. The idiom
“a drop in the ocean” means a
very small or insignificant amount when compared to what is needed or expected. It suggests that the contribution or amount is so minor that it makes little to no difference in the larger picture.
Example Sentence: “The money raised for charity was just a drop in the ocean compared to what’s needed.”