two oceanic plates converging two continental plates converging two continental plates diverging two oceanic plates diverging
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which of these explains how a trench can form?
Possibilities:
- two oceanic plates converging
- two continental plates converging
- two continental plates diverging
- two oceanic plates diverging

two oceanic plates converging