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

Yesterday was the Pride parade in Belfast . It was a really good day , except for a bit of heavy rain in the middle of it all ... I was there with Amnesty International ; to be honest I think if I had n't had work to do all day I 'd have been bored . I had been last year , but due to some friends and their affection for alcohol I did n't see much because I had to look after them . But that 's another story . This year it was different .

Why did I have to look after my friends ?
Options are:
a). Because there was a bit of heavy rain .;
b). None of the above choices .;
c). Because they were drinking heavily .;
d). Because it was a really good day .;...A:
c).