4. Which of the following statements about the mass of an object is correct?
A Mass changes with location.
B Mass remains constant.
C Mass changes with altitude,
D Mass changes with gravity.

there are no options provided but you can choose among the following gender-neutral pronouns: zir, hir, eir, vis, tem, eir.

in the normal course of maintaining a pronoun-antecedent agreement, we could have used the words his or her but since we are also required to use gender-neutral language, we need to replace it with its equivalent gender-neutral pronoun.