Read the passage, and then answer the questions

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Eating habits in Vietnam
Meals in Vietnam - lunch or dinner - must include rice. Traditionally, Vietnamese meals are prepared by wives or mothers and the whole family is expected to eat. However, families now may have only one meal a day at home, and it may not include all the family members.
Tastes, cooking methods and dishes are different between the three regions: the North, the Central, and the South. Nowadays, these differences have become small.
When families do not have time to prepare meals, they eat out. Employees have lunch somewhere nearby the workplaces.
Since Vietnam opened its doors to foreign investors, more foreigners have stayed and worked in Vietnam. As a result, more foreign restaurants have been opened in Vietnam, especially in big cities.
Young people in Vietnam now like fast food because of its conveniences. Vietnamese food fast shops have been opened, and the most successful Vietnamese fast food chain is Pho 24. In recent years, there have been more Vietnamese fast food chains such as Bun Bo Hue 3A3.