Which of the following best describes an overdiagnosis bias? a. slow-progressing cases of disease with a better prognosis are more likely to be identified than faster-progressing cases of disease with a poorer prognosis; b. screening advances the time of diagnosis, making it difficult to evaluate survival; c. occurs when screening identifies an illness that would not have shown clinical signs before a person's death from other causes; d. when the choice of study participants is healthier than the general population, making screening look good; e. none of the answers listed;