Which ratio defines the height of a watt governor to that of the porter governor for equal arm and link lengths, where m is the mass of the ball and M is the mass of the sleeve?

• A. \(\frac{m}{{M + m}}\)
• B. \(\frac{M}{{M + m}}\)
• C. \(\frac{{M + m}}{m}\)
• D. \(\frac{{M + m}}{M}\)