The given phrase means 'The major share of something'.
Option A is incorrect. Its meaning is almost opposite to the required meaning.
Option B is correct. It has the same meaning as the required one. Thus, it is the correct answer.
Option C is incorrect. 'Miserly' means 'insufficient'. It does not have the required meaning and is the wrong option.
Option D is incorrect. The given phrase does not mean 'very small item'.