A person in a dark room looking through a window can clearly see a person outside in the daylight. But a person outside cannot see the person inside. Why does this happen? Available options:
(a). There is not enough light being reflected off the person in the room.
(b). Light rays cannot pass through a window twice.
(c). Outside light does not pass through windows.
(d). Sunlight is not as intense as other sources of light.
(a).