The Drawing Below Shows a Sequence of Stern-Gerlach Devices $\frac{3}{4}$ And $\frac{1}{4}$

Multiple Choice

The drawing below shows a sequence of Stern-Gerlach devices. By analogy to the cases discussed in the chapter, what do you think are the probabilities that an electron entering the last device will come out of that device's plus and minus channels, respectively?

A) 1 and 0 , respectively (AA if reversed, i.e., 0 and 1 )
B) 0.933 and 0.067 , respectively (BB if reversed)
C) $\frac{3}{4}$ and $\frac{1}{4}$ , respectively (CC if reversed)
D) $1 / 2$ for both channels
E) Some other probabilities (specify)