Can anybody figure out why its like this

Someone me with my drivers ed! * i’ll mark you brainliest + 15 free points * a horizontal line of painted across a lane of traffic is called a yield line. a. black triangles b. white triangles c. green diamonds d. white diamonds

The double-blind procedure is most for a.random assignment b.the placebo effect c.operational definitions replication d. standard deviations

Which fossil fuel releases the least amount of carbon dioxide in a year a.natural gas b.coal c.nuclear energy d.oil