Answer:
d. Promotion
Step-by-step explanation:
The marketing strategy is the core for any business, as it has the capacity to increase the sales or decrease the sales.
It basically is the core key of success.
When Henri did work on ambiance of the tobacco store, he added value and created a good view in the eyes of customers, who valued this look.
Adding music, or soft chairs provides for deep relaxation that one feels home like, and sits for a long time.
This is an act of promotion so that the customers are satisfied.
And more and more customers are attracted.