Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to make homemade ph paper test strips [title] Chop up some red cabbage. [step] You'll need to chop about ¼ of a head of red cabbage and put it in a blender. You will extract chemicals from the cabbage to coat your ph paper.

Ending1: In addition, the cabbage juice can have any mild side effects and it will reduce the ph numbers of your test strips. [substeps] Cut the beetroot into 1/2 an inch cubes. Ending2: The yellow cabbage will keep in the refrigerator and the smell of your lab's lab experimenting will be stronger. [title] Mash the red cabbage into a paste. Ending3: It might help to wear headphones while you're blending. [substeps] Put one tablespoon of hot oil in a jar and use a fork to mash the cabbage so it is roughly pureed. Ending4: These chemicals are known as anthocyanins and are found in plants such as cabbage, roses, and berries. Anthocyanins are purple under neutral conditions (ph 7.0) but they change color when exposed to an acid (ph [7.0) or a base (ph]7.0).

Answer format: ending1/ending2/ending3/ending4