The president vetoed the bill; Congress voted to override.
A wouldn't make sense, because then the headline would just be "bill vetoed".B wouldn't make sense, because Congress can't veto bills, and the President can't just pass laws as he likes, because that would make him too powerful (which is why we have checks and balances).C doesn't make sense because again, that's not how the process works. i made some explain and i found them for you
"b. An atom is solid material" would be an example of something that is now considered scientifically inaccurate, since we now know that the atom is actually mostly open space.
The decline of the Maurya Dynasty was rather rapid after the death of Ashoka/Asoka. One obvious reason for it was the succession of weak kings. Another immediate cause was the partition of the Empire into two.