The Statement, "Research Suggests That the Link Between Loss and Depression

The statement, "research suggests that the link between loss and depression is indirect" means that

A) the loss leads to anxiety or some other disorder and that these disorders, in turn, lead to depression.
B) the loss may set in motion a chain of adverse circumstances that increase the risk for depression.
C) the research shows a link to sadness and this indirectly suggests a link to depression.
D) research indicates negative correlations.