Some of the reasons can be:
If you're a pre-teen or a teenager who has only started menstruating, you may find that it takes a while for your period to settle in and become regular.
I couldn't think of anything else, but hope this helped enough!
To find the best answer, ask your mom!
~Aurora
Answer: I think it would either be A or C if those are incorrect sorry
Explanation:
Severe dehydration and electrolyte imbalance.
Sore throat, particularly from excessive and regular vomiting.
Condoms and female condoms