我刚刚拿到美国公民，需要给父母申请绿卡。请问: 3 questions.

我刚刚拿到美国公民，需要给父母申请绿卡。父母现与我们住在一起，探亲签证已过
期， 即逾期居留。请问，
1) 我可以给他们 file I-130 和 I-485 吗？
2)In I-485, there is a question for application type. Question is
"I am applying for an adjustment to permanent resident status because:"
Should I check
" a.: An immigrant petition giving me an immediately available immigrant
visa number has been approved."? or other types?
3). 我父母这种情况需要file I-485A 并交$1000 罚款吗？
请懂移民法的朋友帮忙回答一下。非常感谢!!