“Criteria” versus “criterion”
Criteria is a word which defines collective recommendations for any entity.
I was drafting an email to my client where I wanted to say "are these criteria same which are defined in the previous email?" and it clicked.
Will it be:
Are these criteria same which IS defined?
Are these criteria same which ARE defined?
because to my understanding, I am referring to the word 'criteria' which sounds singular?
Also, how can I miss 'Criterion'? What would be correct usage?
PS: I have sent email which says "are these criteria same which ARE defined in the previous email".
I like to keep my grammar refined whilst communicating with someone. Please advice.