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

Strong coffee<br>I was feeling rather tired. So I decided to make some coffee. I put the k cup in the machine and made it strong. When I tasted it it kicked in instantly. I was then awake all night.

Sentence: I couldn't stay awake, so I drank coffee.
Possible answers: a. Yes; b. It's impossible to say; c. No;
a.