In a System of Balanced Reciprocity,giving a Gift to Someone

In a system of balanced reciprocity,giving a gift to someone:

A) Carries no obligations for either the giver or the receiver.
B) Starts a pattern in which the giver will continue to present gifts and the recipient will show gratitude.
C) Requires that the recipient return a more-or-less equivalent gift at a later date.
D) Demands a counter-gift if the recipient is the same gender as the giver.
E) Is only permitted if the giver is an adult and the recipient a child.