Use the following SQL code to answer the question below it:

$($ SELECT DISTINCT CoverageDim.PayorFinancialClass, CoverageDim.BenefitPlanName

FROM BillingDenialFact.

INNER JOIN CoverageDim ON BillingDenialFact.InsuranceCoverageKey $=$ CoverageDim.CoverageKey $)$ "ClassesAndPlans"

If a parent query joined to this subquery in the FROM clause, how many columns from the subquery w be available to the parent query?

ONE OF THE FOLLOWING $(2$ PTS$)$

A$.$ Two

B$.$ As many columns as there are in BillingDenialFact

C$.$ As many columns as there are in CoverageDim

D$.$ The sum of the number of columns in BillingDenialFact and the number of columns in CoverageDim