Which statement is true about couples in their forties, fifties, and sixties?

Which statement is true about couples in their forties, fifties, and sixties?
A) Studies suggest that compared to same-sex couples, heterosexual couples use more effective communication styles.
B) In interviews, lesbian couples describe more openness and honesty in sharing thoughts and feelings with partners.
C) Across heterosexual, lesbian, and gay research participants, high conflict predicted deeper psychological intimacy.
D) Compared to lesbian couples, gay research participants use more effective communication styles with partners.