Which of the Following Describes Lead-Time Bias

Which of the following describes lead-time 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 the benefit of early treatment.
C) Occurs when screening identifies an illness that would not have shown clinical signs before a person's death from other causes