Write a question about the following article.

Ugh . I seem to have picked up a really bad cold on holiday , probably from my brother - in - law . I felt really feverish yesterday and just managed to do my morning and evening stretches . This morning , I made it about two - thirds of the way through the morning stretches before I had to stop because I felt dizzy .

Question:
Why did they feel dizzy ?
Select from the following.
[a]. Because they woke up early .;
[b]. Because they are sick .;
[c]. Because it was too cold during their holiday .;
[d]. Because they did too many stretches .;