A. completely true (and it has to be 20 characters so i added words)
Using 1000 plants, each for an individual barrel. The plant that was poisoned will die within thirty days, that way the people will not die. Personally I don't see what's so bad about using 1000 humans as text subjected though ;)
Answer:
1. SF 2. S 3. RO 4. SF
Explanation:
1. not a full sentence
2. makes sense on its own
3. 2 sentences with no punctuation
4. not a full sentence