| a. A DataFrame is like a fixed-size dict in that you can get and set values by index label |
| b. Series can be be passed into most NumPy methods expecting an ndarray |
| c. A key difference between Series and ndarray is that operations between Series automatically align the data based on label |
| d. None of the mentioned |
| Answer: A DataFrame is like a fixed-size dict in that you can get and set values by index label |