Final answer:
The correct example of a parenthetical citation is option C: The rose is the most difficult flower to grow (Tanaz, p. 47). This type of citation is commonly used in MLA format to acknowledge the source of information and provide readers with the necessary details to locate the complete source in the works cited page.
Step-by-step explanation:
The correct example of a parenthetical citation is option C: The rose is the most difficult flower to grow (Tanaz, p. 47).
In this example, the author's name 'Tanaz' is mentioned in the sentence, and the page number is enclosed in parentheses after the sentence.
This type of citation is commonly used in MLA format to acknowledge the source of information and provide readers with the necessary details to locate the complete source in the works cited page.