who wants to be my gf i'm 11 years old and in the 5th grade this is serious so if you don't want to be my gf then don't answer

It's not serious dude. You should wait to get yourself a girlfriend.

Explanation:

Also, having a girlfriend at your age, isn't the best decision.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.