When tracking the ________ of a content marketing program, it’s important to keep track of hard costs such as labour, stock images, photography, freelance writer and designer fees.

When tracking the ________ of a content marketing program, it’s important to keep track of hard costs such as labour, stock images, photography, freelance writer and designer fees.

A) ARPU
B) share of voice
C) ROI
D) SEO
E) all of the above