Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

Tet in Viet Nam starts with the first new moon, usually in late January or early February. The celebrations usually last for three days. The Vietnamese celebrate Tet with family gatherings, wonderful foods, and lion dances. Let's take a look at some of the traditions linked to Tet, the most popular festival in Viet Nam.

Red is a bright, happy color that keeps away bad spirits. That's why people decorate their homes with red and yellow to bring good luck for the next year. Also, parents and grandparents give children special lucky money in red envelopes.

One thing people avoid during Tet is sweeping the house. Before Tet, the Vietnamese clean their houses to clear out any bad luck from the previous year. People finish cleaning before the New Year's Day because they believe you'll brush away your good luck if you sweep the house during Tet. People also buy branches of apricot blossom or peach blossom, which symbolize long life, to decorate their houses.

Traditionally, people travel back to their hometowns to celebrate Tet with their family. During their stay, they visit relatives and have large meals together. They wear colourful new clothes to bring them good luck for the coming new year. They also visit flower fairs and calligraphy markets where calligraphers can write poems on “giấy dó”, wood or stone for them.

According to the passage, how long does Tet usually last?