You load a data file named $$sourcefile$.$csv$$ using the following statements:

import pandas as pd

dataframe $=$ pd$.$read$\_$csv$($sourcefile$.$csv$\text{'})$

You would like to print first several rows of the dataset. Which of the following statements should you use?

a$.$

sourcefile.info$()$

b$.$

dataframe.info$()$

c$.$

sourcefile.head$()$

d$.$

dataframe.head$()$