Choose the correct answer.

The formula for the determinant of a square 2X2 matrix.

|ab|

|cd|

is a'd-b'c A subsystem receives one message for each value (i e. a(v) b(v). c(v) and d(v) where v is a real number) These messages can be in any order, and the ensure sequence is followed by an "end" message. The subsystem must calculate the determinant and output it upon receipt of the end message If there are multiple messages for one value (e g . two a(v) messages), or the end message is received before all values have been received, the subsystem should signal an error.

Which state machine correctly models the required behavior? If more than one slate machine is correct, select the one with the fewest slates.

A)

B)

C)

D)