Which sentence best describes the purpose of a constant?

Question $16$ options:

a$)$

It provides an object characteristic and can be used to identify classification patterns so a programmer can design programs with logical input templates.

b$)$

It corresponds to a memory location where data can be stored and easily changed, providing easy program code execution.

c$)$

It provides a data element.

d$)$

It provides a place in memory that holds a value that does not change, making programming code changes easier.