Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to make colored salt rocks [title] Assemble the items needed. [step] Mix well until it becomes soft and jellylike. [title] Mix the salt, glue, and colored sugar in the small bowl.

Ending1: [step] Use a rubber spatula to color each rock. [title] Submerge the rocks into boiling water for at least an hour, to let out the salt. Ending2: [step] Mix together smooth water and shortening until completely blended. [title] Tie the roll of the bluefin. Ending3: [title] When the salt has formed a dough-like consistency, scoop it onto the wax paper. [substeps] At this stage, while the salt " dough " is still malleable, you can mold the salt rock into shapes such as gems, animal shapes, items for adding to hair accessories or pendants, etc. Ending4: [step] Place it in a separate bowl and place in the cupboard. [title] Place in the fridge for 2 hours.

Answer format: ending1/ending2/ending3/ending4