Mathematical sciences<span> is a group of areas of study that includes, in addition to </span>mathematics, those academic disciplines that are primarilymathematical<span> in nature but may not be universally considered subfields of </span>mathematics<span> proper.</span>
It is used to spot out several mechanical and grammatical errors within a piece of writing. Overall, it is used to trim and add decorations to the product (your writing)
Getting all A and B.........
The correct answer is A. Subjective narrator.
When a narrator is subjective, this one expresses or adopts the point of view of a specific character in the story. He usually knows what the character feels or think, but not what the other characters maybe thinking or doing. He has a limited vision of what is occurring in the story.