Select the incorrect description for zooming in d$3.$js

Question $9$ options:

a$.$ When a user wheels or drags your chart, it will zoom.

b$.$ By defining the clipping region, clip$-$path will enable the portions of the element that should be shown.

c$.$ By using $.$zoom$()$ functio, you can extend the viewport.$$

d$.$ The 'zoom base' is the elements that should move.