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.