Which statement best describes the abilities of these devices?

The introduction of consumer phones and tablets into enterprise WLANs can have an impact on
802.11a/b/g/n deployments. The Apple iPhone 4 and iPad 2 are very common examples.
Which statement best describes the abilities of these devices?

A.
The Apple iPhone 4 and the iPad 2 use 2.4 GHz and 5 GHz. The Apple iPhone 4 uses only one
spatial stream and the iPad 2 uses two spatial streams.

B.
The Apple iPhone 4 uses only 2.4 GHz and the iPad 2 only uses 5 GHz. The Apple iPhone 4
uses only one spatial stream and the iPad 2 uses two spatial streams.

C.
The Apple iPhone 4 uses 2.4 GHz and the iPad 2 uses 2.4 GHz or 5 GHz. The Apple iPhone 4
only uses one spatial stream and the iPad 2 uses two spatial streams.

D.
The Apple iPhone 4 uses 2.4 GHz and the iPad 2 uses 2.4 GHz or 5 GHz. The Apple iPhone 4
and the iPad 2 use only one spatial stream.