Which compound has EEE-Z Z\,Z isomers?
CH2=CF2\text{CH}_2=\text{CF}_2CH2=CF2
CHF=CHF\text{CHF}=\text{CHF}CHF=CHF
CH2=CHF\text{CH}_2=\text{CHF}CH2=CHF
CF2=CHF\text{CF}_2=\text{CHF}CF2=CHF
