particular factors encourage people to be drawn into liking one another. in this context the reciprocity of liking effect is primarily associted with? a.) exposure b.)propinquilty c.) similarity d.) physical attractiveness

All of the factors would encourage people to develop relationships, but if I have to pick one, I would pick similarity.

http://drdavespsychologypage.intuitwebsites.com/Relationships__Starting_and_Continuing.pdf