(单选题)Which of the following statements is true?

A、 Utilitarians do not assert that animals have moral rights in the way envisioned by those who appeal to speciesism.
B、 Utilitarians maintain that all animal experimentation are morally permissible.
C、 Speciesists maintain that all animal experimentation are objectionable.
D、 Speciesists maintain that only human beings could experience pain and sufferings.