[Q]: Which of the following solutions is better for the following goal:
How do you add scents to melted candle wax?

[A]: Once you decide on the scent you want for your candle, get the essential oil(s) that correspond(s) to that scent. Add 7 drops of essential oil per 50g of wax for an intense scent. You can add less essential oil for a less intense scent, according to your personal taste.

[Q]: Which of the following solutions is better for the following goal:
To save time when needing to wash dishes,

[A]: wash the dishes as you are cooking while you wait.

[Q]: Which of the following solutions is better for the following goal:
bat

[A]: can steal a screwdriver

[Q]: Which of the following solutions is better for the following goal:
How does one power a robotic claw attached to the arms?

[A]:
An efficient way to do this would be installing batteries within the claw that can power it.