Purple Pigeon Bird Seed Company currently pays preferred stockholders a dividend of $1.50 per share and common stockholders a dividend of $1.00 per share. If the firm wants to raise the common stock dividend to $2.00 per share, it will also have to raise the preferred stock dividend to $2.00 per share. Which type of provision does Purple Pigeon have in its preferred stock agreements?

A call provision

A sinking fund provision

A participating provision