A Hierarchy Custom Setting stores a specific URL for each profile in Salesforce. Which statement can a developer use to retrieve the correct URL for the current user'sprofile and display this on a Visualforce Page?
(A) {!$Setup. Url_Settings__C. Instance[Profile. I.URL__c}
(B) {!$Setup. Url_Settings__C. URL__c}
(C) {!$Setup. Url_Settings__C.[Profile. I.URL__c}
(D) {!$Setup. Url_Settings__C.[$Profile. I.URL__c}

The correct answer is option (B) "{!$Setup.Url_Settings__C.URL__c}".

Explanation:

In computer programing using Visualforce, "$Setup" refers to a global merge field that gives the user access to hierarchical custom settings. In this case, the developer needs to retrieve the correct URL to access the current user's profile and display this on a Visualforce Page. "$Setup" will give the developer access to the hierarchical custom settings in Visualforce, and the command "Url_Settings__C.URL__c" will provide the root access to the current user's profile.

these  signals travel  down a part of the neuron called the axon, which is like a wire that carries the  signal  to othernerve  cells. on average a  nerve  cell sends a  signal  at about 50 meters per second, which is over 100  miles  an hour!