Read the text and determine if the sentence is true (see options at the end):

Staying after school<br>Susie stayed after school with her English teacher. She wanted to express her ideas for her paper. She thought it would help her get a good grade. But when Susie handed in her paper she failed. Susie did not know what she did wrong.

Sentence: Susie is unsure of the reason behind her failure
Available options:
(a). Yes.
(b). It's impossible to say.
(c). No.
(a).