Which of the following is a dietary staple in the diets of Japanese Americans?

Rice is a dietary staple in the diets of Japanese Americans due to its integral role in traditional Japanese cuisine. Rice, specifically short-grain varieties like sushi rice, serves as a fundamental component of many meals and accompanies a variety of dishes. Its significance is reflected not only in daily eating habits, where it is often served with fish, vegetables, and other proteins, but also in cultural practices such as the preparation of rice for rituals and celebrations.

The other options represent staple foods in different cultural contexts. For instance, French bread is associated with French cuisine, pasta is a staple in Italian cooking, and quinoa is commonly associated with South American diets and is known for its health benefits. While these foods are enjoyed by many, they do not hold the same cultural significance or prevalence in the diets of Japanese Americans as rice does.