Which of the following can help relax both premature infants and those suffering pain?

A) an external locus of control
B) a Type A personality
C) mindfulness meditation
D) massage therapy

Massage therapy has been shown to be effective in relaxing both premature infants and those suffering from pain. An external locus of control and Type A personality are not related to relaxation, and while mindfulness meditation can be helpful for reducing stress and anxiety, it may not be as effective for physical pain relief.