The correct answer is a.: specific.
This structure (this +adj) requires an adjective and the only adjective is in a., the other options are verbs or nouns and are not correct.
Further angered, Unferth declares that either he or Grendel will die that night in the cave. Grendel, however, says that he plans to carry Unferth back to the meadhall unscathed. Unferth swears he would rather kill himself, but Grendel points out that such an action would appear rather cowardly.
His plays were written in old English.
