Use the passage to answer the question.
It is unclear why at around the age of fourteen he came to America. From Campagna he had walked and rode on public carts to Naples, where he joined a group of twelve children escorted by Benedictine nuns destined for New York. While in Naples he often snuck away from the Benedictine eye to explore the great historical layers of the city: on the surface lay a modern city, and underground the Roman and Greek cities. Young Rodia was astonished at the magnificent buildings, plazas, gardens, palaces and churches in Naples.
In which phrase from the passage does the author use synecdoche?
“he often snuck away from the Benedictine eye to explore”
“was astonished at the magnificent buildings”
“It is unclear why”
“From Campagna he had walked and rode on public carts”