A. Whoever would pitch in the game had a tough battle against the best hitters in the league.
Explanation:
Noun clause includes the phrase containing the noun and functioning as either the subject or as the predicate of the sentence. These clauses are a fragment that is dependent on the principal clause. Among the given options, option A illustrates the noun clause "whoever would pitch in the game" that is functioning as the subject as well as verb. Thus, option A is the answer.
C. Mainstream media typically has a broad range of viewpoints which can have a more open discussion and can be two sided rather than independent media which argues their opinion
D. Bilbo fears all Wargs because they are allies of the goblins. He is assuming that every Warg is out to get them because they are not aligned with the goblins and the Wargs are.