Please choose the correct ending to complete the given sentence: Making a sandwich: They cut up an avocado and put it on a sandwich. They put mayonnaise on top of the sandwich. they

Ending1: add grated mayo on top which they layer with dressing. Ending2: cut on the cutting board and the sandwich is done. Ending3: cut a piece of bread on a cutting board. Ending4: put a piece of bread on top of the sandwich.

Answer format: ending1/ending2/ending3/ending4