Which answer best describes what this script does?

 1 BEGIN { 2 MYVAR=0 3 } 4 { 5 OC[$1]++ 6 } 7 END { 8 for (C in OC) { 9 print C,OC[C] 10 } 11 }

Does nothing; arrays must be indexed with an integer

Does nothing; the array used on line 5 was never declared

Prints a list of field 1 values and a count of how many times that value was encountered

Runs, but prints nothing. The process block is missing a pattern statement