Which of the Following Alkenes Exhibit E-Z Isomerism?
I $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CHCH}_{2} \mathrm{CH}_{3}$

Which of the following alkenes exhibit E-Z isomerism?
I. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CHCH}_{2} \mathrm{CH}_{3}$
II. $\left(\mathrm{CH}_{3}\right) _{2} \mathrm{C}=\mathrm{CHCH}_{3}$
III. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CHBr}$
IV. $\mathrm{H}_{2} \mathrm{C}=\mathrm{CHCH}_{2} \mathrm{CH}\left(\mathrm{CH}_{3}\right) _{2}$

A) I and II
B) I and III
C) II and IV
D) I, II, and III