What is the purpose of the CONCATENATE function when using the IF function to show only the first instance of each repeating value in a dataset?

a$.$

It identifies any repeating values in the dataset that are occurring by coincidence.

b$.$

It is used to combine a descriptive entry with the repeating value such that all repeating values become unique values.

c$.$

It is used to create a column that contains a unique value that can be associated with the repeating values in a dataset.

d$.$

It is used to delete all repeating values after the first instance.

e$.$

It is used to place all repeating values in a separate column in the dataset.