Chooes the correct letter A, B, C, D according to the passage

How Nam has improved his English. "In the first year of lower secondary school, I had some difficulties in learning English. My pronunciation of English words was really bad and my English grammar was worse. I didn't know how to improve them. One afternoon after the lesson, my teacher of English told me to wait for her outside the classroom. She took me to the school library and show me the cassette of pronunciation drills kept in the glass She also told me how to use an English - English dictionary to improve my English grammar. "Now I think you know what you should do.", said she. I made much progress and only one year later, I won the first prize in the English Speaking Contest held for secondary school students in my hometown.
Chooes the correct letter  A, B, C, F according to the passage.