Secondary sex features are characteristics that develop during puberty. Using the process of elimination, options B and D are really primary gender characteristics. Also, option A has more to do with your genetics than your gender.
That leaves option C. Breasts. They are a secondary sex characteristic that develops during puberty.
Hope this helps! :)
There are three big dangers.
<span>1) Health Risks for the Mother
</span><span>2) Health Risks for the Baby
</span><span>3) Socioeconomic Risks</span>
No, because you never know their intentions and they could come to where you live and potentially kidnap or harm you.