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Came home and was exhausted ! Took such a long nap , but i woke up today early anyway ! It was my moms first day back at the job ! :) Its library day and i also plan on seeing The Pineapple Express !

Question:
Why was I so tired after coming back home ?

(i) I had a long , exciting , but ultimately exhausting day at work today ..
(ii) The walk from work tired me out ..
(iii) I was attacked by hoodlums on my way from work ..
(iv) I just get tired easily ..