Many elephants are poached. Their tusks are used to make valuable ivory objects.

50/50

As many elephants are poached, their tusks are used to make valuable ivory objects.

Unless many elephants are poached, their tusks are used to make valuable ivory objects.

Many elephants are poached because their tusks are used to make valuable ivory objects.

Many elephants are poached, so their tusks are used to make valuable ivory objects.

Giải thích

Chọn đáp án C

"Nhiều con voi bị săn trộm. Ngà của chúng được sử dụng để chế tạo các đồ trang sức từ ngà voi có giá trị."

Câu A, B, D sai nghĩa.