The answer is D) milder than today's climate , with high precipitation
Explanation:
The La Brea tar pit is located in California. It is made up of many pits formed due to the seepage of bitumen from the subsurface to the surface which has accumulated over thousands of years.It is a prehistoric feature.Due to the sticky nature of the bitumen , many animals become stuck in it and die and they end up as fossils as the bitumen protecte their bodies from decomposition. The presence of a lot of fossilized herbivores indicates a flourishing environment with plenty grass to support the herbivores.This is supported by the presence of fossilized plant remains. The climate of California today is arid and would not be able to support the abundance of plants as it existed in the prehistoric times. This indicates that the climate of the prehistoric times was milder and had high precipitation to be able to support such an abundance of plants.