A Drawback with ELISAs Is

A drawback with ELISAs is

A) that they are not well suited for high-volume testing or for when rapid results are needed.
B) the inability of the technologist to make specimen quality evaluations from assessment of the number of cells present.
C) that they cannot be performed by those with minimum training.
D) that they do not include vials of positive and negative sera for quality monitoring of test procedures.