Mum tried to convince me it had probably snuck in once I opened it , but I think they are fucking gross and can squeeze through anything . I long for the days we had a rat loose in the house . That was my fault , I adopted him after he was terrorised after my cats and left him for an afternoon in a cardboard box to recover . He promptly escaped and took over the house for a couple of months .

Based on the preceding passage, choose your answer for question What may be the reason I adopted the rat ?
Available choices:
a). I felt bad for him .
b). I wanted to own him .
c). None of the above choices .
d). I did n't like him .
The answer is:
a).