What is the correct syntax to insert this into an HTML Template Content?

"UC wants to show a custom text field on their Quote Document. This field with API name Additional_Text__c already exists and is located on the Quote object.

What is the correct syntax to insert this into an HTML Template Content?
A . {!quote.Additional_Text__c}
B . {Iquote__r.Additional_Text__c}
C . {ISBQQ__Quote__r.Additional_Text__c}"
D . {ISBQQ__Quote__c.Additional_Text__c}

Answer: A