Remember: you can run your code in the Python shell and you can also call help to find out more about a method $($e$.$g$.,$ help$($str$.$isupper$)).$Select the expression$($s$)$ that produce True.'apple'.upper$()==$ 'APPLE''abc$123\text{'}.$isdigit$()\text{'}$apple$\text{'}.$upper$().$isupper$()\text{'}$apple$\text{'}.$upper$().$islower$()\text{'}$abc$123\text{'}.$isalnum$()\text{'}12\mathrm{.}34\text{'}.$isalnum$()$