From paragraph 3 (“The hot . . . summer jobs”) to paragraph 4 (“So there . . . Didymus”), the narrative shifts from Group of answer choices

a description of the travelers in an airport to a chronological sketch of Adam’s scientific studies.

an account of Adam’s experiences in the airport to a discussion of his recent past.

a focus on the weather conditions near the airport to a discussion of Dr. O’Keefe’s work.

an overview of Adam’s travel plans to a detailed list of his specific itinerary in Lisbon.