Kenning is a double metaphor, usually hyphenated

True.

Explanation:

Kenning is the use of more than one words to mean a single word. It uses two  or more words that may be metaphorical in their sense, replacing a single term but have the same meaning attached to it. It is originally derived from the Norse and Anglo- Saxon form of poetry. The epic narrative poem of "Beowulf" includes lots of kenning it itself, like "whale-road' for sea, and Grendel is called as "shepherd of evil'.

Some examples of kenning in modern English are "book-worm', "fender- bender", "four- eyes", "couch- potato' etc.

c -invasion by the moroccans.

the correct answers are:

c. “never in the history of his people had a man married a woman who spoke a different tongue.”

d. “‘it has never been heard,’ was the verdict of an old man speaking a few weeks later.”

e. “this man had come with others to commiserate with okeke.”