An individualized $($one$-$to$-$one$)$ marketing campaign requires business owners to

calculate the long$-$term value of their customers so they know which ones are most desirable and most profitable

practice "just$-$in$-$time marketing" by knowing what their customers' buying cycle is and time their marketing efforts to coincide with it

collect information on their customers, linking their identities to their transactions

All of the above