20. Which of the following statements best expresses the main idea in paragraph 4? (A) Aided by modern technology, researchers continue to study the history of mindfulness. (B) Practicing Buddhist meditation involves looking outward to observe what is happening in the working environment. (C) Home practices are encouraged as part of mindfulness-based interventions to improve skill development. (D) It is important to know that mindfulness practices do not have to be lengthy to result in positive changes.