"While [Daedalus] worked and issued his warnings, the ageing man’s cheeks were wet with tears: the father’s hands trembled." What can the reader logically infer about Daedalus from this sentence? A. He is worried about the plan’s success
B. He loves his son and wants him to be free
C. He knows the specific rules to flying with the wings
D. He fears Icarus will stay trapped on the island

21 balloons is the story of professor william sherman's travels.

in 1883, he set off from san francisco for a balloon ride over the pacific and was found a month later floating with 21 balloons in the atlantic ocean. this seemed an astounding feat and everyone wanted to know what had happened.    

professor sherman was loyal, however, and said he would tell his tale first to the western american explorers club in san francisco, of which he was a member. this built up suspense for several chapters before he began to tell of the wonders of his adventures and the amazing island of krakatoa, an island which had just been blown up by a volcano.  

the residents of krakatoa are all millionaires who live under a "gourmet government" of their own devising. we get to see all the incredible adventures that creative people with unlimited resources would create according to the author.