Read the following article and answer the question by choosing from the options.

I cried on my way home because I have just been waiting for so long to do it . We had to do these physical tests in order to get certified and I failed the 200 yard swim . ~_~ I was almost there , but it was the first time I 'd gone swimming since ' 06 and I got water up my nose and had been rushing . FAIL .

What may be the cause of my sadness ?
Choose your answer from: (a). I had to skip the 200 yard swim .; (b). I put a plug on my nose but I still swam too slow .; (c). My swimming did not meet the standard .; (d). Swimming a lot lately did n't hlep me pass the test .;...A:
(c).