The constructionist view of discourse comprehension is most likely to emphasize:

The constructionist view of discourse comprehension is most likely to emphasize the character’s motivations and emotions. Since discourse comprehension means building a meaning from extended parts of language you can infer that constructionist views more than what is seen in the eye. 

well it depends i think people around the world are coming around to gay marriage. but if you are talking abortion then wow, so much to talk about. such as men thinking they have the right to choose if women can, the fact there are health concerns if the women can't get one, and many more arguments to discuss. so i would definitely say abortion would be a much more interesting topic.