Q1:The artist Renoir’s last word was “flowers,” spoken as they arranged a bouquet of roses just picked from his garden in a vase on his bedroom windowsill. - as they arranged a bouquet of roses just picked from his garden
B. as a bouquet of roses had been just picked from his garden and was being arranged - as a bouquet of roses just picked from his garden was being arranged
- during the arrangement of a bouquet of roses just picked from his garden
- while they arranged a bouquet of roses that had just been picked from his garden
why c not d,
Q2: Caribou are wary animals with excellent hearing, so stalking them over the treeless landscape, getting close enough to kill it with nothing but a handheld lance, as Dorset people did, required exceptional hunting skill. - so stalking them over the treeless landscape, getting close enough to kill it
- so to stalk them over the treeless landscape and get close enough to kill one
- so in order to stalk them over the treeless landscape and get close enough to kill one
- and so in order to stalk it over the treeless landscape, getting close enough to kill it
- and so stalking them over the treeless landscape and getting close enough in order to kill it
why b not a | 
