A child is enjoying the ducks on a fall day .
It is impossible that the ducks make the sound 'gobble ' , 'gobble ' as they walk around .
It is impossible that the ducks make the sound 'gobble ' , 'gobble ' as they walk around .
It is probable that the ducks make the sound 'gobble ' , 'gobble ' as they walk around .
The ducks make the sound 'gobble ' , 'gobble ' as they walk around .