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 agtonished
at the magnificent buildings, plazas, gardens, palaces and churches in
Naples

Use the passage to answer the question.
In which phrase from the passage does the author use synecdoche?

A. was astonished at the magnificent buildings"
B. 'From Campagna he had walked and rode on public carts"
C. the often snuck away from the Benedictine eye to explore"
D. "It is unclear why"

C. "the often snuck away from the Benedictine eye to explore"