A researcher is performing a pulse-chase experiment in eukaryotic cells. She takes a sample of cells during this experiment and determines that these cells contain radiolabeled RNA in both nuclei and cytoplasm. These cells were likely sampled
a. at the start of the pulse-chase experiment, prior to the pulse and chase stages.
b. after the pulse stage of this experiment but prior to the chase.
c. after the chase stage of the experiment (i. e., toward the end).
d. after either the pulse stage (before the chase) or the chase stage (toward the end).
e. None of the answers is correct.