Answer:
Passenger vehicle
noun. a passenger vehicle designed for operation on ordinary roads and typically having four wheels and a gasoline or diesel internal-combustion engine.
In this case it would be an adverb.
Hope this helps !!!
Answer:
The secret agents, disguised in civilian clothes, managed to easily <u>blend</u><u> </u>in with the crowd and get downtown
I will go with b if i was you