The statement that best fits the question is the last one, searching for an apartment requires available time to list, evaluate options and visit the prospects, therefore what Elena spends searching for a new apartment is her <em>time</em> and off course the equivalent in <em>working hours</em> from her job regarding those days she missed; thus looking for an apartment coasts her the money <em>she could have earned</em> from the<em> time</em> she spent visiting.
