I decided to stop trading with them.

1225/1620

___________, I decided to stop trading with them.

Despite of the fact that they were the biggest dealer

Though being the biggest dealer

Being the biggest dealer

Even though they were the biggest dealer

Giải thích

Despite (In spite of) + Ving/ N,…= Despite the fact that + S + V.... = Although/ even though + S + V,…: mặc dù…
Tạm dịch: Dù họ là những bạn hàng lớn nhưng tôi vẫn quyết định dừng làm ăn với họ.
=> Đáp án D