Four phrases/ sentences have been removed from the text below. For each question, mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 19 to 22.

Vietnam is a country rich in history and cultural traditions. Traditional festivals (19) that are

celebrated by people across the country are seen as a way to honor the past. Tet is one of the most important festivals. This celebration is (20), with families gathering to enjoy traditional food and activities.

In addition to Tet, other festivals like the Mid-Autumn Festival and the Hung Kings Temple Festival (21), attracting thousands of visitors every year. These festivals highlight not only Vietnam's history but also the deep respect Vietnamese people have for their ancestors. However, as modernization spreads, there is (22) these cultural festivals for future generations. Younger people are encouraged to participate and understand their cultural roots, ensuring that these important traditions are not lost.

A. are becoming more and more popular

B. among the deep-rooted traditions

C. the earliest festival celebrated during the year

D. an increasing concern about preserving