Using the csv module you declare a reader:

reader $=$ csv$.$DictReader$($file$,$ delimiter$=",")$

Now when you say "for row in reader:"

what does the row variable contain?

Choice $1$ of $4$:Objects of type row

Choice $2$ of $4$:Lists of strings

Choice $3$ of $4$:Dictionaries where the key is the column name and the value is the value from that row and column

Choice $4$ of $4$:Dictionaries where the key is the column name and the value is the entire list of values from that column.