Which detail from the text supports the main Idea that Apollo 13 needed help? A. The Apollo 13 mission was supposed to be the third space flight to land on the moon.

B. There were only three astronauts on the mission: James Lovell, Fred Haise, and Jack Swigers.

C. Apollo 13 had already been in space for two days.

D. Astronaut im Lovell reported a problem to Mission Control.​​

D

Explanation:

# carry on learnin

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.