Which of the following options correctly joins the two sentences.
"Jane is studying for her exam."
"Jane wants to get a good grade"?
1
Jane is studying for her exam, and she wants to get a good grade.
2
Jane is studying for her exam, but she wants to get a good grade.
3
Jane is studying for her exam; she wants to get a good grade.
4
Jane is studying for her exam because she wants to get a good grade.