I doubt that it is really wise to rely on the help from the people who are not specialists in it. I had a similar task and I need to confess that I asked the writers from "Marvelous Essay" to help with that. The result was even better than I have expected.
ᴘᴇʀᴘᴇᴛᴜᴀʟ ɪ ʙᴇʟɪᴇᴠᴇ ʙᴜᴛ ɪᴍ ɴᴏᴛ sᴏ sᴜʀᴇ
Germany had to fight to many upfront which lead to it's defeat
we know that
A kenning is a figurative expression that substitutes a name or a noun. It is usually a compound of two words and words have scripts. The Kennings are associated with the poetry of the ancient Norse, Icelandic and Anglo-Saxon.
Examples
First Lady - wife of the president
Four-eyes = someone who wears glasses
therefore
the answer is the option
A) a kenning.