Question
If Earth's atmosphere were composed of significantly larger particles than it currently has (large enough to scatter all wavelengths similarly), the clear daytime sky would most likely appear scattered light can appear white
still distinctly blue
closer to white, since large particles scatter light of longer wavelengths too and
completely black
green
Detailed Explanation
The chapter notes that when scattering particles are large enough, scattered light may appear white rather than selectively blue -- this is consistent with why very large particles wouldn't produce the same blue-sky effect.