When Asked About the Similarities Between the Conversations Couples Have

When asked about the similarities between the conversations couples have in a lab and the conversations they would have at home (when not being observed) what do most couples say?

A) Conversations in the lab are much different from conversations they would have at home.
B) Conversations in the lab tend to be more negative than conversations they would have at home.
C) Conversations in the lab are very similar to conversations they have at home.
D) Conversations in the lab are very different than conversations they would have at home because of the time limits that researchers put on discussion topics.