After Two Years,Yana and Marec Have Finally Worked Out Comfortable

After two years,Yana and Marec have finally worked out comfortable relationships with each others' children and are happy with visiting arrangements.According to the text,what is likely to happen in the years to come?

A) They will have to work hard to keep these arrangements from changing.
B) They will need to resolve role ambiguities.
C) They will need to make adjustments as circumstances change.
D) They must be vigilant so that family boundaries won't become permeable.