According to our theory of solar system formation, what three major changes occurred in the solar nebula as it shrank in size?
a. its mass, temperature, and density all increased
b. its gas clumped up to form the terrestrial planets, nuclear fusion produced heavy elements to make the jovian planets, and central temperatures rose to more than a trillion kelvin.
c. it gained energy, it gained angular momentum, and it flattened into a disk
d. it got hotter, its rate of rotation increased, and it flattened into a disk

D.It got hotter, its rate of rotation increased, and it flattened into a disk

Explanation:

The nebula theory proposes that our solar system was born about 4.6billion years ago out of a gigantic interstellar cloud.

These interstellar gases are made up of some gases and some microscopic particles. The gravitational pull by the particles caused the cloud to collapse inward. The collapse triggered increase in temperature and the rate of rotation spiked. This caused the collapsed cloud to flatten into a disk with a centre bulge which later forms the sun.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.