The correct answer is Diagram A
Explanation:
Diagramming sentences involves representing visually the structure of a sentence. In this, the first element is a horizontal line, which is divided by a vertical line, moreover, the first element in the line is the subject, which goes to the left, while the predicate (verb, objects, etc) go to the right.
This occurs only in diagram A because the word "Melanie" which is the subject or agent of the action is the first element in the diagram. Also, the predicate, which is "has given her family and friends concert tickets and backstage passes" is located after the vertical line. Besides this, the direct objects of the sentence "tickets and passes" and the indirect objects "family and friends" are correctly organized in branches connected to the verb.