Observation of life i think
I don’t know man looking back
The bolded word here is the BESTSELLER. This kind of complement is a direct object complement. The adjective overnight denotes to the object bestseller which is an adjective. Another adjective complements another adjective, thus, the term direct object.
Many customers said they had a chance to eat and drink in a cleaner environment.
I would say A because the first sentence is comparing the two sports while the second sentence is contrasting the two sports. Hope this helps!