The word “apparition ” carries complicated meanings in the poem “In a Station of the Metro”. What are the connotative meanings of it? 
A、“Apparition” means something ghostly which cannot be clearly observed.
B、“Apparition” reflects that the beauty is closely bound up with ugliness in real life. 
C、“Apparition” means “appearance”, in the sense of something which appears, or shows up.
D、“Apparition” implies both presence and absence—transience.