Answer:
A). It serves to introduce the topic of Wampanoag culture at Patuxet.
Explanation:
Mann starts the selection by using an argument of Tisquantum which assists him in 'introducing the topic associated with the Wampanoag culture of Patuxet.' The discussion helps to give an impression of his purpose and helps present the civilized, calm, and peaceful Dawnland( of Pautext) and their customs, heritage, etc. more effectively and give strength to his argument. Thus, option A is the correct answer.