To Assess the Magnitude and Severity of Late Effects on the Exposed

To assess the magnitude and severity of late effects on the exposed population from the 1986 nuclear power station accident at Chernobyl

A) follow-up is not necessary because the radiation received by the entire exposed population was fatal.
B) minimal follow-up is only necessary because the exposed population did not receive sufficient radiation exposure to cause severe late effects.
C) short-term follow-up studies are necessary.
D) long-term follow-up studies are necessary.