The correct answer is C.

The app builder needs to display only the first five digits from the parent Account’s ZIP+4 custom text field. Salesforce’s LEFT() function returns a specified number of characters from the beginning of a text string, so the correct formula is:

LEFT(Account.Zip_Code__c, 5)

Salesforce formula documentation confirms that LEFT returns characters from the beginning of a text string.

BEGINS() checks whether text starts with specific characters. LPAD() pads text to a specified length. TEXT() converts certain data types to text, but it does not extract the first five characters.

===========