能正确生成词云图的程序是（   ）
A、import wordcloud w = wordcloud( ) w.generate("python is very nice! ") w.to_file("wpic.png ")
B、import wordcloud w = wordcloud.Wordcloud("python is very nice! ") w.generate( ) w.to_file("wpic.png ")
C、import wordcloud w = wordcloud.WordCloud( ) w.generate("python is very nice!") w.to_file("wpic.png")
D、import wordcloud w.generate("python is very nice! ") w = wordcloud.WordCloud( ) w.to_file("wpic.png")