Correct Answer: Arbitrary

Solution : The correct choice is the first option.

Capricious means unpredictable, impulsive, or subject to whim or fancy. Arbitrary aligns closely with these characteristics, referring to decisions or actions made without reason, based on personal choice or impulse rather than logic or principle.

The meanings of the other options are as follows:

• Stable: Firm, steady, or unchanging.
• Steadfast : Resolutely or dutifully firm and unwavering.
• Cautious : Careful or prudent, showing attention to potential risks or dangers.

Therefore, the correct answer is arbitrary.