In W$.$D$.$ Ross's ethical framework, what distinguishes prima facie duties from actual duties?

Prima facie duties are situational and may change, while actual duties remain constant.

Prima facie duties are absolute and must always be followed, while actual duties depend on the situation.

Prima facie duties are arbitrary, while actual duties are morally binding.

Prima facie duties are derived from consequentialist principles, while actual duties are deontological.