This is a test of commonsense with single/multi-choices. Complete the next sentence:

They are put in a pan and covered with water. Kale is being chopped up on a cutting board. it

pick from the following. 1). is then sliced and boxed. 2). is cleaned with a sponge. 3). is tossed in salt for a few minutes. 4). 's popped in the oven.
The answer is:
3).