Choose the best topic sentence from the four options below. Writ

Choose the best topic sentence from the four options below. Write the corresponding letter of your choice on the answer sheet.
A、Lessons might be taught in a local language even though many people speak English.
B、One needs to thoroughly analyze the disadvantages before deciding to study abroad.
C、Staying far away from home for a long time is an obstacle for overseas students.
D、Tuition fees can be as high as 15,000 pounds for one academic year in the UK.
【正确答案】：B