Which sentence from the section "Detecting Lead And Cyberbullying" BEST explains the technology behind Gitanjali's lead sensor?​

Why does black lung aka arthur morgan let only jhon and abigail go and not sadie in the last chapter

30 points! : ) also! question number two! analyze the connection mlk makes between the emancipation proclamation and the current situation african americans were experiencing. a; martin luther king was speaking about the need to free african americans from slavery, just like abraham lincoln did years ago. b; martin luther king makes the point that 100 years after slaves were freed by the emancipation proclamation, they are not truly free due to continued segregation. c; martin luther king thought life was going very well for african americans, and no further action needed to be taken. he showed extreme gratitude to abraham lincoln. d; martin luther king expressed extreme anger towards abraham lincoln for not ending segregation.

Can someone me with this project i really need the