Assuming the following grades DataFrame:

Wally Eva Sam Katie Bob

Test$1871009410083$

Test$29687778165$

Test$37090908285$

which of the following statements a$),$ b$)$ or c$)$ is false?

Question $11$ options:

One benefit of pandas is that you can quickly and conveniently look at your data in many different ways, including selecting portions of the data.

The following expression selects the 'Eva' column and returns it as a Series:

grades$[\text{'}$Eva$\text{'}]$

If a DataFrame's column$-$name strings are valid Python identifiers, you can use them as attributes. The following code selects the 'Sam' column using the Sam attribute:

grades.Sam

All of the above statements are true.