Adesire for more than one needs

Choose the best translation of the following sentence.i know what is happening.je sais que arrive.je sais ce que arrive.je sais qui arrive.je sais ce qui arrive.

When she came to my house je mange, je vais manger, je mangeais, je mangerais

This is the second question in my french quiz. i have 8 questions left can someone me plz