Identifying molecules with multiple double bonds

Steps:

• Examine the Lewis structures or skeletal formulas of each option.
• Count the number of C=C or other double bonds in each molecule.
• Identify options with zero or one double bond and eliminate them.
• Select the option with at least two double bonds.

Why B is correct:

• Option B features two C=C double bonds in its conjugated diene structure, satisfying the criterion for at least two double bonds per organic chemistry bonding rules.

Why the others are wrong:

• A contains only one double bond in its alkene chain.
• C has no double bonds, resembling an alkane.
• D includes one double bond and a triple bond, but lacks a second double bond.

Final answer: B