The Rotation Periods of Venus, Jupiter, Saturn, Uranus and Neptune

Multiple Choice

The rotation periods of Venus, Jupiter, Saturn, Uranus and Neptune are difficult to determinebecause:

A) they rotate so fast.
B) they are all gas giants.
C) they are so far away from the Sun.
D) their surface features are obscured by their atmospheres.
E) each one has a large satellite that interferes with this measurement.