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

Mark's dog returns<br>Mark had lost his dog over a month ago. He missed his dog very much. One evening while mowing the lawn he notices something. He sees a dog in the street that looked like his lost dog. It turns out to be his lost dog who had returned home.

Sentence: Mark was not cutting his grass at the time he saw his dog's doppelganger.
Options:
(A). Yes.
(B). It's impossible to say.
(C). No.