Multiple Choices
(Choose 1 answer)
import numpy as np
matrix = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])
Which of the following is valid operation on the above NumPy array object?
A. matrix.xstack()
B. matrix.sum()
C. matrix.set(1)
D. matrix.ystack()
