When converting an XML document to Java classes, how should you think about XML elements?

a$.$ Elements are equivalent to classes.

b$.$ Elements are like instance variables.

c$.$ Elements are similar to superclasses.

d$.$ Elements can be instance variables, classes, or methods.

What is wrong with the following statement? boolean result $=$ statement. execute$("$SELECT $*$ from emp WHERE empNum $=\text{'}?"\text{'})$;

a$.$ boolean should be Resultset

b$.$ execute should be executeQuery

c$.$ execute should be prepareStatement

d$.?$ should be an integer