A same meaning or not problem:
On 26 March 2012 , it was first successfully concluded by a 12-year-old American , Tom Schaar .
It was first successfully completed on 26 March 2012 by a twelve-year-old American , Tom Schaar .
****
[A]: yes

A same meaning or not problem:
He died on 27 December 1966 in Woodland Hills and was buried at the Oakwood Memorial Park Cemetery in Chatsworth .
He died in Chatsworth on December 27 , 1966 , and was buried at Oakwood Memorial Park Cemetery in Woodland Hills .
****
[A]: no

A same meaning or not problem:
The new coalition government has abolished the South West Regional Development Agency and replaced it with local business partnerships .
The new Coalition Government abolished the South West Regional Development Agency and replaced it with Local enterprise partnerships .
****
[A]: yes

A same meaning or not problem:
Cambodia is represented in Canada through its UN mission in New York City .
Cambodia is represented through its UN mission in New York , Canada .
****
[A]:
yes