Why Is a Greenhouse an Imperfect Analogy for How Earth's

Multiple Choice

Why is a greenhouse an imperfect analogy for how Earth's atmosphere behaves?

A) A greenhouse allows longwave radiation to escape and mix with the surrounding air,unlike Earth's atmosphere.
B) The glass of a greenhouse is designed to allow transmission of both longwave and shortwave radiation,whereas certain atmospheric constituents only allow transmission of shortwave radiation.
C) It is exceedingly rare for a greenhouse to contain carbon dioxide like Earth's atmosphere contains.
D) Passage of longwave radiation to space is delayed by certain atmospheric constituents,but not trapped like an actual greenhouse.