The Nexus company wants to get a contract to build roads in Nigeria. It is the standard business practice for companies to give payments and gifts to officials in Africa. Nexus could easily lose the contract to a competitor. Which of the following ethical theories is defined as a belief in time-and-place ethics and holds that ethical truths depend on the circumstances?

a. Moral relativism theory

b. Utilitarian ethical theory

c. Deontological theory

d. Casuist ethical theory