Read this excerpt from The Call of the Wild For two days and nights Buck never left campnever let Thornton out of his sight He followed him about his work, watched him while he , saw him into his blankets at night and out of them in the morningBut after two days the call in the forest began to sound more imperiously than ever Buck's restlessness came back on him and he was haunted by recollections of the wild brother, and of the smiling land beyond the divide and the run side by side through the wide forest stretches. Once again he took to wandering in the woods, but the wld brother came no more, and though he listened through long vigils, the mournful howl was never raised How has Buck changed ? A He has become more anxious about the call from the wild B He has become less haunted by his dreams has become more loyal to all mankind D He has become less aware of his past life as an obedient pet