u B
Building up feeble colonies. If I have a fertile queen I can give
the small colony a frame containing maturing workers, when hatched repeat. 
The queen has comb to lay in, and bees to take care of her eggs, in a
few days a powerful swarm may in this way be made. 
Then near front entrance by which bees get up end down near where
they go in and out, and which will not at all interfere with cleaning
out the hive. 