Adap Matrix to avoid scrolling?

Dear communiy,

I want to use a Matrix with fife columns, but the las column is not showed completly. A scroll is needed, to Show the complete "Prefer not to answer" option:

I don't want to Change the layout because then I have Problems at other Points and also don't want to make the font size smaller.

Do you have any idea how to solve this design Problem?

Thanks a lot!!
CW