[Q]: Which of the following solutions is better for the following goal:
To protect files from being lost,

[A]: back the files up to an external hard drive where the originals are not already stored.

[Q]: Which of the following solutions is better for the following goal:
To poke a hole in the side of an aluminum can, you can

[A]: Use sharp scissors

[Q]: Which of the following solutions is better for the following goal:
What should you do to prepare a glass window for frosting?

[A]: Scrub to remove all dust and debris from the surface, then thoroughly dry with a soft absorbent cloth. Tape a border along the inside of the window frame, using painter's tape. This border will be the portion of window you don't want frosted.

[Q]: Which of the following solutions is better for the following goal:
how can I plant a broken piece of cactus?

[A]:
Check the broken end of the cactus. ... Set the cactus piece aside allowing the cut end to callous over. ... Fill a pot with cactus mix. ... Insert the calloused end into the soil approximately 1 to 2 inches deep. ... Place the pot in a warm, sunny window. Water the soil thoroughly, two to four weeks later.