Which version of the sentence is correctly punctuated?

A. Kayaks which were first used as hunting boats in the Arctic Ocean, differ
from canoes in many ways.

B. Kayaks, which were first used as hunting boats in the Arctic Ocean, differ
from canoes in many ways.

C. Kayaks which, were first used as hunting boats in the Arctic Ocean differ
from canoes in many ways.

D. Kayaks, which, were first used as hunting boats in the Arctic Ocean differ
from canoes in many ways