The visible surface of Uranus and Neptune are bluish-green because they consist of:

A) oceans of liquid water
B) blue glacial ice
C) methane and other gases
D) materials that are very cold because they are very far from the Sun

Bluish-Green

A color that is a blend of blue and green, often associated with certain minerals, plants, or shallow waters.

Methane

A colorless, odorless gas that is the simplest alkane and a potent greenhouse gas, often produced by anaerobic digestion of organic material.

Visible Surface

The part of any object or phenomenon that is perceptible by the eye under normal conditions.