Research on Effective Methods to Achieve Health Behavior Change Suggests

Research on effective methods to achieve health behavior change suggests:

A) All of the necessary evidence required to modify negative health behaviors already exists, but has not been properly disseminated
B) Systematic-reviews and meta-analyses have been overused as sources of evidence
C) Interventions should be based on theory and developed from formative research
D) Too much time and money has been spent on the development of valid and reliable data collection instruments
E) Theory is becoming less relevant and there should be a renewed focus on practice-based research