criteria/ standard/ norm

[flytothesky]

HI~ Would you help me how to say this naturally please?
I'm all the time confused these three words...

Landlord: If you use a lot of water you should pay extra charge. But it’s not going to over $10 a week.

Tenant: ⓐ What are the criteria for using a lot?
ⓑ What’s the standard for using a lot?
ⓒ What’s the norm of using a lot?

Landlord: When you over use government fixed average amount of water, you need to extra.


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A: I heard that you failed the interview?

B: Yea, I thought I could pass.

A: Me too. Strange,, You had the best conditions among them.
ⓐ What are the criteria for chosing people of that company?
ⓑ What’s the standard for chosing people of that company?
ⓒ What’s the norm of chosing people of that company?

B: Maybe appereances?

A: Oh, yea, then understandable. Told you put some make up before interviewing.

[Soup]

Landlord: If you use a lot of water, you'll have to pay extra. But it won't be more than $10 a week.

Tenant: How much is 'a lot'? / What is considered 'a lot'?

Landlord: An amount over the government fixed average.

Tenant: What's the fixed amount / fixed average?

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A: I heard that you failed the interview?

B: Yeah, I thought I could pass.

A: Me too. Strange, you had the best conditions among them.

What are the criteria for choosing people of that company?

What do they look for in choosing their employees?

B: Maybe appearances?

A: Oh, I see. Well, that's understandable. (I) Told you to put some make up on before interviewing.

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Correction
I'm always confused by these three words.