Finally we reached the top of the canton tower

Finally we reached the top of the canton tower
1、Finally we reached the top canton tower,（）We could admire the whole city.
A from that
B from where
Cfrom whom
Dfrom what
2、The Picking of the cotton ,（）they receive a lot of money,Takes about five days.
Awith which
Bby which
Cfor which
Dat which