Question $7$: cMOS, improper

The following circuit is improper $($non$-$complementary$)$ cMOS. Which of the following input combinations results in an indeterminate digital output, Z $?$

$($a$)$ ABC$=011$

$($b$)$ ABC$=010$

$($c$)$ ABC$=000$

$($d$)$ ABC$=100$

$($e$)$ ABC$=101$