Answer:
i believe it's a) Heading and the B)Their
Google it i remember watching it in school that’s all
Answer:
It's <u>on</u> Five Avenue<u> </u><u>,</u><u> </u>between Eight and Ninth Streets/
are the dinosaurs <u>on</u> the third floor?
It's in front <u>of</u> the stairs.
He's <u>at</u> home right now.
I believe b, because then is considered a transition word