Avariable isa. measurable trait or characteristic that is subject to change under different conditionsb. the extent to which a measure provides consistent resultsc. the unintended influence that observers or experiments can have on their subjectsd. a speculative statement about the relationship between two traits

Option (A)

Explanation:

In the discipline of mathematics, the variable is considered to be or referred to as the symbol which is used in order to represent the arbitrary factor or element of the following set. In the addition to the numbers, these variables are also commonly used in order to represent the vectors, functions and the matrices.

yes i would go with c

hope i

-lavira: )