Answer:
at
Explanation:
It is most likely at but all of them gramatically make sense but not physically.
For example, you cannot stand in a door but the sentence is correct.
Standing on a door is quite strange but the sentence itself makes sense
<span>If my memory serves me well, ''the censors'' and ''rhinoceros'' both explore themes related to these topics : </span>hardship and survival,honesty and deception. These two couple of themes are being developed using such literary device of comparing and contrast in each of the stories.
Hope you will find that helpful.
Answer:
self driving cars, high speed rail networks, Next GEN GPS devices, and Gyroscopic Vehicles.
Explanation: