A same meaning or not problem:
Before the unification of Yemen in 1990 , the law set the minimum age of marriage at 16 in South Yemen and 15 in the north .
Prior to the unification of Yemen in 1990 , the law set the minimum age of marriage at 16 in South Yemen and 15 in the north .
****
[A]: yes

A same meaning or not problem:
Pablo Neruda 's personal secretary was in Chile for nearly two years .
For almost two years , Pablo Neruda was Adoum 's personal secretary in Chile .
****
[A]: no

A same meaning or not problem:
The band then added bassist Duane Cowan , who moved from Los Angeles to Japan recently .
The band then added bassist Duane Cowan , who had recently relocated from Los Angeles to Japan .
****
[A]: yes

A same meaning or not problem:
He represented the country at UEFA Euro in 1968 , when Yugoslavia lost in the final to Italy .
He represented the country at UEFA Euro 1968 , as Italy lost to Yugoslavia in the final .
****
[A]:
no