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

I had a ball watching this movie . I was humming in my head to all the beats and song . I had no idea I know about ABBA songs so much ! If you 're a musical fan , then this movie is for you .

Why did the writer have a ball watching this movie ?
OPTIONS: [i] Because they know about Abba .; [ii] None of the above choices .; [iii] Because they really enjoyed it .; [iv] Because they had no idea they know about Abba songs .;...A:
[iii]