hello, please chose the correct answer from below, thanks for your help so much.

A-Plus Dry Cleaners wants to understand its customers perceptions of the quality of the companys customer service. They plan to survey a sample of its customer base. What will A-Plus need to do to ensure that their data is valid and reliable?

• The survey must include items that ask customers to rate the friendliness of the staff, the survey must include all customers from the north side of the city, and the survey method must appeal to all respondents.

• The survey must include items that ask customers about their dry cleaning experiences, the survey sample must include the first 15 customers off the customer database, and the survey method must be repeatable.

• The survey must include items that ask customers to rate the appearance of the dry cleaning store, the survey must include all customers, and the survey method must include setting up a table outside the local dollar store.

• The survey must include items that ask customers to rate the quality of the companys customer service, the survey sample must represent all parts of the customer population, and the survey method must be repeatable.