so here 's a story.i need to get rid of that fucking turtle tank . decided i was going to clean it last night . i can be brave and move the turtles by myself , which was a feat , lemme tell ya . i used the net but the little fuckers would n't let go then stopped moving and i thought i suffocated them .
According to the above context, choose the best option to answer the following question.
Question: What is causing the tank to become so dirty for the narrator ?
Options:
- The tank is being dirtied by the cat .
 - The tank is being dirtied by the fish .
 - The tank is being dirtied by the turtles .
 - None of the above choices .


The tank is being dirtied by the turtles .