The Clayton Act regulates all but which of the following?

The last time Betty visited Zing's, the dinner served was excellent. Tonight is her anniversary and she was looking forward to an enjoyable evening

After the meal, she starts feeling that the service was not up to par and the evening was not as successful as she had hoped. According to the service-quality model, which gap is obvious here?

Tau b, tau c, and gamma are available to measure association between two ________-level variables

A) nomimal B) ordinal C) interval D) ratio