PART a All Container Ships That Are Ocean Going Are $\begin{array} { l } \text{All C are A }\\ \text { All C are O}\\\end{array}$

PART A All container ships that are ocean going are air polluters. Hence, all container ships are air polluters.
Which of the following correctly expresses the form of this argument? a. $\begin{array} { l } \text{All C are A }\\ \text { All C are O}\\\end{array}$$\quad$ b. $\begin{array} { l } \text {All C are A }\\ \text { All C are O are A}\\\end{array}$$\quad$ c. $\begin{array} { l } \text {All CS are O }\\ \text {All CS are A }\\\end{array}$

d. $\begin{array} { l } \text {All C are O }\\ \hline\text {All C are A }\\\end{array}$$\quad$ e. $\begin{array} { l } \text {All C are O are A }\\ \hline\text { All C are A}\\\end{array}$ PART B
Which of the following substitutions proves the argument invalid?
A) C = husbands, O = married, A = men.
B) C = men, O = humans, A = mammals.
C) C = men, O = married, A = husbands.
D) C = wives, O = divorced, A = women.
E) C = cats, O = animals, A = dogs.