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
The answer is B identifies the source of danger
Not all people can automatically filter out unecessary information
people may have additional challenges that make it harder to comprehend
people are busy with survival and do not need information
can all be true
but in a emergency situation the person will listen more closely because they need the information badly
The answer is German measles