Which contains a sentence error?
1.Greta loves helping people more than anything, her passion led her to volunteer for the Peace Corps.

2.Greta loves helping people more than anything. Her passion led her to volunteer for the Peace Corps.

3.Greta loves helping people more than anything; her passion led her to volunteer for the Peace Corps.

4.Greta loves helping people more than anything, and her passion led her to volunteer for the Peace Corps.