So u know how ur doing and so u dont hurt ur self
<span>B. nonrestrictive clause
Since it is nonrestrictive, it is not necessary and is set off by commas.
Hope this helps :)</span>
C. Milky Way should be capitalized because it's a proper title. Earth is tricky in the sense that sometimes it is capitalized and sometimes it is not. Here, it should be because its in relation to other planets.
