The correct answer to this open question is the following.
Although there are no options attached we can say the following.
In the context of research on relational values, their degree of acceptance of Maria can be described as that of active inclusion.
When we are talking about active inclusion in sociological terms, what we mean is that all people, regardless of their race, gender, ethnicity, or background, are considered to participate in any decision or event.
In this case, Roan and Paul were disappointed to hear about Maria's situation, gave some consideration to the idea of changing the date of the reunion, but decided to go ahead with the plan. At least, they considered Maria's reasons.
So in a broader, social context, active inclusion can be understood as allowing or enabling all kinds of people. including minorities or less favored people, to actively participate in all aspects of the social life of a country.