What Does Asymmetrical Mean in Relation to an ADSL Modem

Multiple Choice

What does asymmetrical mean in relation to an ADSL modem?

A) The modem has an irregular shape to fit more compactly into the computer slot.
B) The modem uses a D connector.
C) The modem has a disproportionate amount of memory in relationship to the processor speed on the modem.
D) ADSL uses faster downstream speeds than upstream.