The table below shows the approximate percentage make-up of the atmospheres of four different planets. Which gas mixture has the highest density?
- AJupiter: $\text{H}_2$ 89.8%, He 10.2%, $\text{CH}_4$ 0.0%
- BNeptune: $\text{H}_2$ 80.0%, He 19.0%, $\text{CH}_4$ 1.0%
- CSaturn: $\text{H}_2$ 96.3%, He 3.3%, $\text{CH}_4$ 0.4%
- DUranus: $\text{H}_2$ 82.5%, He 15.2%, $\text{CH}_4$ 2.3%