Question: What does the following code do ? for ( var col = 0 ; col < a [ 2 ] . length; + + col

What does the following code do?
for ( var col =0; col < a[2].length; ++col )
a[2][ col ]=0;
Question 6 options:
Sets all the elements in row 2 to zero.
Sets the rows and columns to zero.
Sets the rows to zero.
Sets the columns to zero.

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