The molecule illustrated below occurs naturally and may be produced by joining four identical monomer molecules. What might the structural formula of the monomer be?
- A$\text{CH}_3\text{CH}_2\text{CH}_2\text{CH=CH}_2$
- B$\text{CH}_3\text{CH=CHCH=CH}_2$
- C$\text{CH}_2=\text{C(CH}_3)\text{CH}_2\text{CH}_3$
- D$\text{CH}_2=\text{C(CH}_3)\text{CH=CH}_2$