I think it's A because the other answers don't fit/ make sense
Answer:
The sothern states though it was awesome!
Explanation:
One of the most significant challenges is building an airplane had to do with "propulsion", since the technology that allowed motors to have enough energy to lift an airplane into the sky with a passenger wasn't available for most of history.
Answer:
The first president of India was "Rajendra Prasad"
Explanation:
