Canada has vast areas of wilderness, from the Arctic north, _______ average winter temperatures are usually -20 ⁰C, to the border with the USA in the south, _______ is said to be the longest border in the world not defended.

A. which, where  B. whose, which   C. where, where   D. where, which

Canada has vast areas of wilderness, from the Arctic north, _______ average winter temperatures are usually -20 ⁰C, to the border with the USA in the south, _______ is said to be the longest border in the world not defended.

1. A.
   which, where
2. B.
   whose, which
3. C.
   where, where
4. D.
   where, which

Canada has vast areas of wilderness, from the Arctic north, _______ average winter temperatures are usually -20 ⁰C, to the border with the USA in the south, _______ is said to be the longest border in the world not defended.

A. which, where  B. whose, which   C. where, where   D. where, which

 Canada has vast areas of wilderness, from the Arctic north, _______ average winter temperatures are usually -20 ⁰C, to the border with the USA in the south, _______ is said to be the longest border in the world not defended.

A. which, where  B. whose, which   C. where, where   D. where, which

Canada has vast areas of wilderness, from the Arctic north, _______ average winter temperatures are usually -20 ⁰C, to the border with the USA in the south, _______ is said to be the longest border in the world not defended.

A. which, where  B. whose, which   C. where, where   D. where, which