Answer: definitely call your sister, it sucks going through school sick
Explanation:
I am a 10th grader and I sometimes get sick, I have went through the day without calling my parents because they never pick me up, if you wait to get picked up you may end up getting more sick from walking around
I would think it would be simple but it might be compound. Hope this helps somewhat
I would say false I looked on an on-line thesaurus and didn't find an etymology