Read the following passage then answer the questions below

Read the following passage then answer the questions below. 
For centuries, poets, writers and musicians have mentioned the ao dai in poems, novels and songs. The ao dai is the traditional dress of Vietnamese women. It consists of a long tunic that is slit on the sides and worn over loose pants. Traditionally, it was frequently worn by both men and women. The design and material used for men were different from those used for women. Nowadays, women usually wear it, especially on special occasions. However, many Vietnamese women today often prefer to wear modern clothing at work, because it is convenient.
Now fashion designers want to change the traditional ao dai. Some have printed lines poetry on the ao dai, so they look modern and very fashionable. Other designers have taken inspiration from Vietnam's ethnic minorities. They have visited villages and studied traditional designs and symbols such as suns, stars, crosses, and stripes. They have added these patterns to the ao dai, so Vietnamese women can continue to wear the unique dress, which is now both traditional and fashionable.
51. Why do Vietnamese women wear the ao dai?
    A. Because it is convenient clothes.        B. Because it is modern clothes.
    C. Because it is traditional clothes.        D. Because it is fashionable clothes.
52. How has designers modernized the ao dai?
    A. By mentioning it in poems, novels and songs.    B. By wearing it at work.
    C. By printing lines of poetry on it.            D. By showing it to everyone
53. In the line 9, the phrase word "ethnic minority" means ..............
    A. not many people    C. friendly people    B. many people    D. excited people.    
54. By tradition, who used to wear the ao dai?
    A. Men           C. Children        B. Women         D. Men and women    
55. Which of the following sentence is NOT true?    A. Some designers have modernized the ao dai
    B. Majority of Vietnamese women wear modern clothes at work.
    C. The ao dai is the traditional dress.    D. The ao dai is modern dress.