A same meaning or not problem:
The Peak family remained at Kilallah for only a few years when the house was purchased by a Mr Fletcher who sold it to the Horrigan family .
The Peak family remained in Kilallah for only a few years , when the house was bought by a Mr Horrigan who sold it to the Fletcher family .
****
[A]: no

A same meaning or not problem:
If the used assay varies , the selective pressure changes on the cells and can therefore change what properties are selected in the transformed cells .
If the selected assay varies , the selective pressure changes on the cells and can therefore change what properties are used in the transformed cells .
****
[A]: no

A same meaning or not problem:
In 1856 in their home in Boston , Agassiz founded a school for girls from Cambridge .
Agassiz founded a school for girls from Cambridge in her home in Boston in 1856 .
****
[A]: yes

A same meaning or not problem:
However , the church we see today was replaced in 1640 , designed by Agostino Avanzo , and consecrated in 1655 .
However , the church that we see today was replaced in 1640 , designed by Agostino Avanzo , and consecrated in 1655 .
****
[A]:
yes