下列选项中，程序运行的效果为圆环图的是（）。
选项：

A:Import numpy as npImport matplotlib.pyplot as pltData = np.array(20, 50, 10, 15, 30, 55])Pie_labels = np.array('A', 'B', 'C', 'D', 'E', 'F'])Plt.pie(data, labels=pie_labels)Plt.show()
B:Import numpy as npImport matplotlib.pyplot as pltData = np.array(20, 50, 10, 15, 30, 55])Pie_labels = np.array('A', 'B', 'C', 'D', 'E', 'F'])Plt.pie(data, radius=1.5, labels=pie_labels)Plt.show()
C:Import numpy as npImport matplotlib.pyplot as pltData = np.array(20, 50, 10, 15, 30, 55])Pie_labels = np.array('A', 'B', 'C', 'D', 'E', 'F'])Plt.pie(data, radius=1.5, explode=0, 0.2, 0, 0, 0, 0],labels=pie_labels)Plt.show()
D:Import numpy as npImport matplotlib.pyplot as pltData = np.array(20, 50, 10, 15, 30, 55])Pie_labels = np.array('A', 'B', 'C', 'D', 'E', 'F'])Plt.pie(data, radius=1.5, wedgeprops={'width': 0.6},labels=pie_labels)Plt.show()