Identify the object$-$oriented principle violated in this code.

public class DatabaseAccess $\{$

public void saveToDatabase$($String data$)\{$

$//$ Database$-$specific logic

$\}$

$\}$

a$.$

Each class in your application should have only one reason to change.

b$.$

Classes are about behavior and functionality.

c$.$

Code to an interface rather than to an implementation.

d$.$

None

e$.$

Encapsulate what varies.