Using the P$2$P Data Model as shown, what is EKKO : $\_$CEL$\_$P$2$P$\_$ACTIVITIES table relationship type?

Remember that in the P$2$P Data Model, the Activity table is called $\_$CEL$\_$P$2$P$\_$ACTIVITIES, and the Purchasing Document Item Table $($EKPO$)$ is the Case table.

A$\mathrm{.}1$:N

B$.$N:$1$

C$.$Indirect $1$:N

D$.$N:M