It should be Hutsi! I remember this subject from a while back
The layer of the sun that contains jets of rapidly moving gas called spicules is known as a corona
The answer is B.
I have been through an educational gap since June 2016. Until now it comes about two years. From that time I was thinking if I went to a local university or go abroad to start further study. Eventually, I decided to go abroad to accept the more advanced education. I knew that in China there are a lot of top universities put all emphasis on academic so that the the academic standard of entrance is very strict and it was more difficult for me. However, in abroad, the universities not just pay attention to academic but also your activities and volunteer, therefore, I thought this was more adaptable for my future study.