Limited research indicates that therapeutic intervention before the onset of mental disorders can mitigate factors identified as major contributors to them. But a much more comprehensive research program is needed to verify these results and allow for the design of specific health care measures. Thus, in order to explore a potential means of cost-effectively helping people prone to mental disorders, we should increase funding for intervention research. Which one of the following, if true, most strengthens the argument?
A: Once a mental disorder disappears, there is a fair chance that it will recur, given that complete cures are rare.
B: Most minor mental disorders are more expensive to treat than other minor health problems.
C: Prevention research can be coordinated by drawing together geneticists, neurologists, and behavioral scientists.
D: Reducing known risk factors for mental disorders is relatively inexpensive compared to the long-term treatment required.
Choose A, B, C or D as your solution.
D