Final answer:
The Surrealists were particularly interested in the importance of the unconscious mind, and they used dreamlike and bizarre imagery in their art as an expression of subconscious thoughts and desires.
Step-by-step explanation:
The group particularly interested in the importance of the unconscious mind, including elements such as dreams, fantasies, and hallucinations, was B. the Surrealists. This artistic movement was deeply influenced by the theories of Sigmund Freud, and they explored the subconscious through their art, expressing dreamlike scenarios and bizarre images. The Surrealists focused on automatism and dream interpretation as methods for tapping into the subconscious. They were keen on using their art to challenge reality and to release the thoughts of the subconscious mind, which they saw as a source of creativity and profound imagination.