"The correct answer is Careless. Key Points   The word 'Cautious' means having or showing a close attentiveness to avoiding danger or trouble. The antonyms of the word 'Cautious' are careless, heedless, incautious, unmindful. From the antonym of the given word, we can say that the word 'Careless' is opposite in meaning. The word 'Careless' means not paying or showing close attention. Hence, the correct answer is option 1. Let's see the meaning of other given options-  WORDS  MEANING  Common   occurring, found, or done often; prevalent  Careful   making sure of avoiding potential danger, mishap, or harm; cautious   Crazy mad, especially as manifested in wild or aggressive behaviour   Additional Information The synonyms of the word 'Cautious' are careful, heedful, alert, conservative. Example of 'Cautious' in a sentence: The committee report was cautious about challenging Murdoch's attempt to deflect blame."

The literal antonym of tolerant is intolerant. It seems like that would be a good fit for your post from the snippet that you've provided.

Other options would be unforgiving and aggressive.

Since this is for meta, don't forget to include a hand drawn picture of a circle around a unicorn that's in the midst of making a jquery joke.

RECKLESS is an antonym for cautious.