Read the following context and choose the best option to answer the question.
Context: Many of the studies used the Dyadic Assessment Schedule ( DAS ) for the assessment of relationships and also continuous depression outcome measures . The essential finding from this meta - analysis was that there was no significant reduction in depression scores resulting from couples therapy although there was a reduction in relationship distress . The authors conclude with a number of recommendations including further studies with a longer follow - up period . In summary , the authors of this meta - analysis find that couples therapy is effective at improving relationship distress but not depressive symptoms in couples where one partner has depression .
Question: What may be the reason for these results ?
Options: 
- Relationships can cause underlying depression .
 - None of the above choices .
 - People enter relationships while having problems with depression .
 - Depression is not as easy to fix as a relationship .


Depression is not as easy to fix as a relationship .