Which one of the following words is an antonym for cautious

C.Because all the other answers are synonyms of cautious.

Doulingo is good. you can also watch movies that are in french, i am using this tactic  for japanese  and it a lot. listing to music with  french  lyrics would work well too because  you could absorb  the words while having fun.hope this ! : )

Where's the excerpt? also i think the answer is the last one