The reason why he took the official government examination at a late age was that ____.

* Hướng dẫn giải

Dẫn chứng: Born in Co Am village in 1491, he got the teaching from the second-rank doctor Luong Dac Bang and passed the official government examination in 1535, ranking number one in the country. This was a period of great instability in Vietnam which may explain the reason why he took the exam at such a late age.

(instability (n): tính không ổn định, tính không kiên định, tính không vững)

Đáp án đúng: C. the country went through many conflicts