Answer: d) involvement
Step-by-step explanation:
In terms of relationship development, involvement stage is defined as the level where emotion , feelings, thoughts, views, likes and dislikes are shared and communicated with each other.Partners tends to exchange detailed information about their personal view and life.
According to the question,Colby and Mac are involved in the involvement stage in accordance with relationship concept.They are exchanging their feelings likes and other feelings on second date.
Other options are incorrect because contact stage signified act interaction at initial level. Intimacy stage is related with romance. Dissolution stage is the level of break-up between partners.Thus, the correct option is option(d).