Massage increases the production of the neurotransmitters __________.

Massage therapy has been shown to positively influence the production of various neurotransmitters that play significant roles in mood regulation and overall mental health. The correct answer highlights the relationship between massage and the increase in serotonin and dopamine levels.

Serotonin is a neurotransmitter often associated with feelings of well-being and happiness. It helps regulate mood, appetite, sleep, and social behavior. Increased serotonin levels can enhance the overall sense of relaxation and reduce feelings of anxiety.

Dopamine is another crucial neurotransmitter involved in the brain's reward circuitry. It contributes to feelings of pleasure and satisfaction, reinforcing behaviors that promote positive experiences. The release of dopamine during massage can create a sense of reward and euphoria, further enhancing the therapeutic effects of massage on both physical and emotional health.

Thus, the combination of increased serotonin and dopamine due to massage therapy helps to improve overall mood, reduce stress, and promote relaxation, making this answer the most appropriate option in the context of the question.