In the Research Study Described by Your Authors Where Married

In the research study described by your authors where married couples were asked how sure they were about the future of their relationship, what was demonstrated?

A) Outside observers were able to determine accurately how certain each partner was based on the amount of eye contact that they made during their conversation.
B) Men were more "certain" of the future of their relationship if both partners rated their sexual interactions favorably.
C) Women were more dominating of conversations that included emotional questions.
D) A person's assessment of their partner's behavior was influenced by the level of certainty they felt about their relationship.