A sample relation and its current state is provided below. Use it to answer the questions below:

CUSTOMER

According to the data in the sample relation provided above identify which of the following are

superkeys: $($Select all that apply$)$

Do not guess, this is a multiple$-$answer question, Carmen add points for a correct answers and

subtracts points for bad answers.

Cust ID$,$ Credit Card #$,$ Exp Date

Cust ID

Credit Card #

Credit Card #$,$ Exp Date, Address

Credit Card #$,$ Exp Date

Name