You will be given a definition of a task first, then some input of the task.
In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.

Question: Was the artist for "The Mighty Thor" older than both of its writers? Passage:Journey into Mystery is an American comic book series initially published by Atlas Comics, then by its successor, Marvel Comics. Initially a horror comics anthology, it changed to giant-monster and science fiction stories in the late 1950s. Beginning with issue #83 (cover dated Aug. 1962), it ran the superhero feature "The Mighty Thor", created by writers Stan Lee and Larry Lieber and artist Jack Kirby, and inspired by the mythological Norse thunder god. The series, which was renamed for its superhero star with issue #126 (March 1966), has been revived three times: in the 1970s as a horror anthology, and in the 1990s and 2010s with characters from Marvel's Thor mythos. The title was also used in 2019 for a limited series as part of the "War of the Realms" storyline.
 Links: a. Thor (Marvel Comics) b. Jack Kirby c. Norse mythology d. Jack Kirby
Output:
b