Step 1: Meaning of the phrase
"Pacta sunt servanda" is a Latin phrase meaning "agreements must be kept". It is a fundamental principle of international law that all treaties and agreements between states are binding and must be honored in good faith.
Step 2: Explanation of options
- Option A accurately captures the essence of the principle.
- Options B, C, and D describe related ideas but do not capture the core imperative of respecting treaties.
Therefore, option A is correct.