Poorly trained workers could have an unfavorable effect on which of the following variances?

$\backslash$table$[[,$Labor Rate,Materials Quantity$],[,$Variance,Variance$],[$A$),$Yes,Yes$],[$B$),$Yes,No$],[$C$),$No$,$Yes$],[$D$),$No$,$No$]]$

Multiple Choice

Choice A

Choice B

Choice C

Choice D