Is a high or low albedo better for Earth's temperature?

The lower temperature is better.

The lower the albedo, the better the earth.

Explanation:

Here on Earth, the albedo effect has a significant impact on our climate. The lower the albedo, the more radiation from the Sun that gets absorbed by the planet, and temperatures will rise. If the albedo is higher, and the Earth is more reflective, more of the radiation is returned to space, and the planet cools.

it sounds like either a or c