build.sbt

/** Your task is to reason your way to which compiler
 *  options which will be passed for each of
 *    1) sbt root/compile
 *    2) sbt p1/compile
 */

scalacOptions := Seq("-DSBT")

               scalacOptions in ThisBuild += "-D0"
                  scalacOptions in Global += "-D1"
                            scalacOptions += "-D2"
                 scalacOptions in compile += "-D3"
                 scalacOptions in Compile += "-D4"
                      scalacOptions in p1 += "-D5"
           scalacOptions in p1 in compile += "-D6"
           scalacOptions in p1 in Compile += "-D7"
      scalacOptions in Compile in compile += "-D8"
scalacOptions in p1 in Compile in compile += "-D9"

lazy val root = project in file(".")
lazy val p1   = project