The answer is A: choices.
Existentialism is a very complicated and diverse philosophical and literary movement. Sartre, his most ardent defender, believed that the world lacked any kind of teleology or finality, ultimately proving to be absurd for a human being to submit to any kind of norm or historical purpose. However, based on this background of absurdity, the human being is revealed as condemned to freedom, that is, to making choices without any foundation on which to base one´s own choices, which invariably carry practical and existential consequences that must always be, invariably, assumed as one´s own productions.