What is the output of the following code [closed]

Question

What is the output of the following code?
sc.parallelize(Array(1L,("SFO")),(2L,("ORD")),(3L,("DFW"))))
val routes = sc.parallelize
Array(Edge(1L,2L,1800),Edge(2L,3L,800),Edge(3L,1L,1400)))
val nowhere = "nowhere"
val graph =Graph(airports,routes,nowhere)
graph.triplet.sortBy( ,attr, ascending=false).map(triplet=>
triplet.attr.toString + " " + triplet.scrAttr+" " +
triplet.dstAttr).collect.foreach(println)

a) 1800 ORD SFO
1400 DFW SFO
800 DFW ORD

B) 800 ORD SFO
1400 DFW SFO
1800 DFW ORD

C) 1800 DFW ORD
1400 DFW SFO
800 ORD SFO