Answer:
The missing options are:
a- Antwan acted cocky in the face of his challengers.
b- Everyone admired the valiant knight as he rode off to slay dragons.
c- Mark made a gutsy move in the chess game, but he lost in the end.
d- If Keisha was afraid, her cheeky attitude concealed it.
The answer is option is b
Explanation:
Valiant is the word that has the most strong positive connotation about its meaning, unafraid. We can see its strong connotation since it refers to the knight and what he did, which characterizes him as someone who is not afraid to lose his life while fighting against a dragon, that is why valiant has the most strong connotation when we refer to an unafraid person.