In Cognos A Sales report requires the user to select a Country and City for the report. The City prompt should only contain cities for the selected country. What needs to be done to accomplish this?

Question $16$ Select one:

A$.$

Set the Cascade Source property for the City prompt to "Country"

B$.$

Drag the City prompt into a Conditional Block and set the variable to vCountry

C$.$

Filter the City prompt using the expression $[$City$]$ IN $([$Country$])$

D$.$

Add a Layout Calculation of ParamDisplayValue$(\text{'}$Country$\text{'})$ to the City prompt