Can we draw the following hypothesis from the context (see options)?

Context:

A pleasant place it was , -- so clean and cool , and as full of sweet odors as if the ghosts of buttercups and clover still haunted the milk which they had helped to make .<br>Dolly was churning , and Polly was making up butter in nice little pats .<br>Both were very kind , and let Daisy peep everywhere .<br>All round on white shelves stood the shining pans , full of milk ; the stone floor was wet ; and a stream of water ran along a narrow bed through the room , and in it stood jars of butter , pots of cream , and cans of milk .<br>The window was open , and hop-vines shook their green bells before it .

Hypothesis: Dolly and Polly are sisters.
OPT: *Yes. *It's impossible to say. *No.
It's impossible to say