A same meaning or not problem:
As an assistant to Carl Flugge in Gottingen , Nicolaier discovered Clostridium tetani , the bacterium that causes tetanus , in 1884 .
As assistant to Nicolaier in Gottingen , Carl Flugge discovered the bacterium Clostridium tetani , which causes Tetanus in 1884 .
****
[A]: no

A same meaning or not problem:
The Gill family sold the mill in 1968 , and the new owners closed it in 1980 .
The Gill family sold the mill in 1968 and was closed by the new owners in 1980 .
****
[A]: yes

A same meaning or not problem:
The 375th Airlift Squadron ( 457 AS ) is part of the 457th Air Mobility Wing and is stationed in the Andrews Air Force Base , Maryland .
The 375th Airlift Squadron ( 457 AS ) is part of the 457th Air Mobility Wing and is stationed at Andrews Air Force Base , Maryland .
****
[A]: yes

A same meaning or not problem:
In 1958 he spoke throughout East Asia and Western Europe and in 1961 in Northern Ghana .
He spoke throughout East Asia and Ghana in 1958 , and in 1961 in Northern and Western Europe .
****
[A]:
no