What is the magnitude response |W(ω)| of a rectangular window function?

• A. \(\frac{|sin(ωM/2)|}{|sin(ω/2)|}\)
• B. \(\frac{|sin(ω/2)|}{|sin(ωM/2)|}\)
• C. \(\frac{|cos(ωM/2)|}{|sin(ω/2)|}\)
• D. None of the mentioned