However / there / several certain difficulties / m...

Câu hỏi: However / there / several certain difficulties / most students / study / abroad have to encounter.

A. However, there is several certain difficulties that most students studying abroad has to encounter.

B. However, there are several certain difficulties that most students study abroad has to encounter.

C. However, there are several certain difficulties that most students studying abroad have to encounter.

D. However, there were several certain difficulties the most students studying abroad have to encounter.