Question

though antonio was proud of his italian ___, he really had never visited the country.

Explanation:

To solve this, we analyze the context: Antonio is proud of his Italian something, and he hasn't visited Italy. "Heritage" refers to cultural or family background, which fits as being proud of Italian heritage (cultural background) even without visiting the country. "Ancient" is an adjective, "doubts" is a noun about uncertainty, "clumsy" is an adjective, and "relying" is a verb form—none fit the context as well as "heritage".

Answer:

A. heritage