8. which statement suggest a direct proportion?

A. 5 cups of flour per 2 glasess of water and if there are 10 cups of flour it will need 4 glasess of water

B. 4 paiters can paint the whole dome in 30 days, if there are 8 painters doing the same job it will take only 15 days to finish

C. 10 masons can finish building a wall in 20days; if there 5 masons currently working on the same job it will take 40 days to finish

D. 6 laborers can unload all the things in 2 hours, if there are 12 laborers are working in the same job it can take only 1 hour to complete ​