What will this code do$?$

Connection conn $=$ DriverManager.getConnection$("$jdbc:mysql:$//$localhost$/$library$",$ "user", "pass"$)$;

PreparedStatement ps $=$ conn.prepareStatement$("$DELETE FROM books WHERE id $=?")$;

ps$.$setInt$(1,10)$;

int rowsAffected $=$ ps$.$executeUpdate$()$;

System.out.println$($rowsAffected$)$;

a$.$

Does nothing since executeQuery$()$ is missing.

b$.$

Prints the number of rows affected.

c$.$

Deletes the book with id $=10.$

d$.$

Throws a SQL syntax error. it is possible to choice more than one