Identify the main idea of this paragraph:

This ship is carrying kala fever serum to Group One on Woden. Their own supply was destroyed by a tornado. Group Two-the crew your brother is in-is eight thousand miles away across the Western Sea and their helicopters can't cross it to help Group One. The fever is invariably fatal unless the serum can be had in time, and the six men in Group One will die unless this ship reaches them on schedule. These little ships are always given barely enough fuel to reach their destination and if you stay aboard your added weight will cause it to use up all its fuel before it reaches the ground. It will crash, then, and you and I will die and so will the six men waiting for the fever serum.

A.) The kala fever is a disease that kills men in space, particularly those on Woden. The EDS pilot knows about this fever from experience.
B.) The EDS must reach its destination because the lives of six men depend on it. If Marilyn stays on board, the ship will not reach them.***
C.) Marilyn's brother chose to work for Group Two, and that took him far from Woden. On Woden, a tornado destroyed precious supplies.
D.) A tornado destroyed the fever serum that was on its way to Woden. Woden needs the serum as soon as possible

B.) The EDS must reach its destination because the lives of six men depend on it. If Marilyn stays on board, the ship will not reach them.

that is the correct answer

B.) The EDS must reach its destination because the lives of six men depend on it. If Marilyn stays on board, the ship will not reach them.

The main idea of this paragraph is that the EDS (Emergency Dispatch Ship) must reach its destination because the lives of six men depend on it. If Marilyn stays on board, the ship will not reach them. The paragraph mentions that the ship is carrying kala fever serum to Group One on the planet Woden, as their own supply was destroyed by a tornado. The fever is fatal unless the serum can be delivered in time, and the ship must reach Group One on schedule for them to survive. Marilyn staying on board would cause the ship to use up all its fuel, resulting in a crash and the death of Marilyn, the six men waiting for the serum, and possibly others. Therefore, option B is the correct answer.

Correct.