How to freeze pesto<br>Scoop your pesto into an ice cube tray using a spoon. Fill each cell in the ice cube tray evenly. Don't put so much pesto in that the cells overflow into each other.

Based on that paragraph can we conclude that this sentence is true?
The ice cube tray needs to be made out of metal.

Select from the following. (I) Yes (II) It's impossible to say (III) No