Justin Thyme Used to Run One Batch Each of 500

Multiple Choice

Justin Thyme used to run one batch each of 500 As,300 Bs and 100 Cs every month but now he runs a batch of 5 As,3 Bs,and 1 C every half day:

A) thanks to his employer's move away from single-digit setups.
B) now that he has andon lights installed at the appropriate work centers.
C) now that he embraces mixed-model assembly.
D) in order to increase muda.