This question has options. Answer the question about text:

About 12noon we started to lift up towards the south . Soon thereafter the entertainment programming started . Headphones were at charge for 2 dollars . I did had my own ( better :p ) headphones .

Why did I have my own headphones ?
OPT:
(I). I knew the airline charges money for their headphones .
(II). None of the above choices .
(III). I wanted to listen to music with my friends .
(IV). I knew my headphones were best on the road .
(I).