The attacks on the two buildings were part of a single plan conceived by one man in service of a single agenda. They unfolded _____3_____ a few min...

The attacks on the two buildings were part of a single plan conceived by one man in service of a single agenda. They unfolded _____3_____ a few minutes and yards of each other, targeting the parts of a complex with a single name, design, and owner. And they launched a single chain of military and political events in their aftermath.


a) in
b) on
c) at
d) by
e) for