The only sentence which is not a proposition is Sit down, because this is imperative, you are ordering somebody to do something, whereas propositions merely inform.
Answer:
The real-life Annabelle story began in 1970 when a 28-year-old nurse received the Raggedy Ann doll as a birthday gift from her mom. She put the rag doll on her bed and began to notice it changing positions. A leg would be crossed, or the doll would be lying on its side. According to the Warrens, a student nurse was given the doll in 1968. They say the doll behaved strangely, and that a psychic medium told the student that the doll was inhabited by the spirit of a deceased girl named "Annabelle".
Explanation:
<span> Acetate's ability to dissolve in acetone is used in the production of which one of these types of lace?
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Answer:<span>B. Guipure
Good luck!</span>