Suppose that you are asked to analyze the Big$-$Oh of the following method pop$().$ What pieces of additional information which need to give a perfectly accurate answer? Select all that apply.

public ItemType pop$()\{$

if$($isEmpty$())$

throw new NoSuchElementException$()$;

ItemType element $=$ top.getElement$()$;

top $=$ top.getNext$()$;

n$--$;

return element;

$\}$

Group of answer choices

The Big$-$Oh of isEmpty$().$

The type that will be used in place of ItemType.

The number of times pop$()$ will be called.

The Big$-$Oh of the constructor of the NoSuchElementException class.