Which one of the following changes data or structure in a database?

a)$)$USE MyBookshop;

b)$)$SELECT name, price, price +4.99$+4\mathrm{.}99$AS postedPrice FROM Books;

c)$)$SELECT *$*$FROM Books WHERE price >=2.50$>=2\mathrm{.}50$;

d)$)$SHOW TABLES;

e)$)$ UPDATE Books SET price=$=$price+1$+1$ WHERE id=22$=22$;