Is it unethical to develop technology capable of replacing human employees, hence displacing humans?

a. Yes, it is unethical under Act Utilitarianism because some individuals will be negatively influenced by the technology, hence the designer of the technology is harming people's livelihoods. b. No, it is ethical based on Deontology because all technology can be applied to everyone equally, it is reasonable to produce such technology in order to improve human society's living standards, and individuals are not utilized as means to an end. c. Yes, it is unethical under the Social Contract if technology makes the vulnerable individuals in society worse off than they were before. d. None of the above are correct.