A Study Entitled 'Structural Equation and Log-Linear Modelling: a Comparison

A study entitled 'Structural equation and log-linear modelling: a comparison of methods in the analysis on caregivers' health' by Zhu et al. (2006) showed a large effect size in the interaction between psychological health and physical health (source: http:/ / www.biomedcentral.com/ 1471-2288/ 6/ 49) . What can be deduced by this finding?

A) Both factors are significantly related in the study.
B) Both factors are significantly unrelated in the study.
C) Both factors have an effect on the study results.
D) None of the above.