To promise for a cause means to be loyal to that cause?

The correct answer is true.

It is true that you promise for a cause means to be loyal to that cause.

When someone says "you promise to the cause" it means that you expressed your commitment for that cause and that you are accountable for that promise. You have the obligation to fulfill your commitment and deliver the expected results. Your respect also means that you show loyalty to the people and the motives of the cause. An example could be in an independence movement. The leaders of the movement "promised for the causes." So yes, you promise for a cause means to be loyal to that cause.

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