Explanation:

- Notwithstanding our victory today, we must be careful to avoid a feeling of complacency.

- This sentence suggests that despite winning, there should be caution against becoming too comfortable or self-assured.

- Option 1: Smug and self-satisfied.

- This option describes a feeling of being overly pleased with oneself, which aligns well with the idea of complacency.

- Correct Answer

- Option 2: A defensive attitude.

- This implies being guarded or protective, not directly related to complacency.

- Option 3: Pride.

- Pride refers to a sense of satisfaction from achievements. While related, it doesn't capture the self-satisfaction of complacency.

- Option 4: Feeling of superiority.

- This suggests believing oneself better than others, which is different from being complacently satisfied.