What is the approximate temperature range of the Earth's crust?

The Earth's crust exhibits a temperature range that typically falls between 200°C to 400°C as you move deeper into the crust, especially at depths of several kilometers. Near the surface, temperatures can be significantly lower, often around 0°C to 30°C, but as depth increases, geothermal gradients— the rate at which temperature increases with depth— account for the higher temperatures observed deeper in the crust.

The chosen answer aligns with the reality that as you go deeper into the Earth, the temperature rises due to the increase in pressure and heat from the Earth's interior. This range is a reflection of typical conditions found in various geological settings, such as where geothermal energy is harnessed.

In contrast, the other options suggest ranges that either fall below typical crustal temperatures or significantly exceed them. For instance, temperatures of 0°C to 100°C mainly pertain to surface conditions or shallow depths, while the higher ranges (500°C to 700°C and 1000°C to 1200°C) are more characteristic of the Earth's mantle or even closer to the molten core, where conditions are entirely different from those found in the crust.