This is a test of commonsense. Complete the next sentence:

How to address key selection criteria in a cover letter
Read the key selection criteria thoroughly if they're provided.
Read the criteria through several times to ensure you understand what each one means. If you're having trouble with one, research it to clarify the meaning.
You could also ask the opinion of someone you know to see what they think it means. Some countries, such as australia, require that all public-sector jobs provide a list of key selection criteria.