The structures of ethyl cinnamate and cinnamic acid are shown below. Select all of the correct statements. O O Ethyl cinnamate O OH Cinnamic acid Neither cinnamic acid nor ethyl cinnamate molecules can participate in hydrogen bonding An ethyl cinnamate molecule can hydrogen bond with another ethyl cinnamate molecule A cinnamic acid molecule can hydrogen bond with another cinnamic acid molecule An ethyl cinnamate molecule can hydrogen bond with a cinnamic acid molecule