Read the text and determine if the sentence is true (see options at the end):

Hamster<br>Sara's brothers was sad. His pet hamster died. Her brother was distant and just stood in his room all day. Sara's check came and Sara went to the pet store. She bought him a new hamster and he was happy.

Sentence: Sara's brother is bipolar which is demonstrated at the ease in which she could reverse his disposition with a simple purchase. 
Options: (i). Yes; (ii). It's impossible to say; (iii). No;
(ii).