There is more than one conjunction in the sentence, the word but acts as a coordinating conjunction. Also the words not only and but also act as a correlative conjunction.
Answer: C
Explanation: It would be the most responsible and polite thing to do, not just call out someone else or leave the customer expecting a call.
Answer and Explanation:
A recreational activity I did was to paint images of animals using my hands as brushes. This activity was carried out indoors, that is, inside a house and not outdoors.
The activity was very profitable, because it allowed great fun for everyone involved, while we imagined which animals resembled the shapes that our hand, dirty with ink, presented on paper. I believe that it would be very useful to redo this activity in a zoo, where we could observe the animals up close, but we would have to be careful with the dirt that the paint causes.