Which of the Following Statements Best Describes the Current State

Multiple Choice

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

A) The cause of the acceleration is well-understood,and attributed to the particles that make up dark energy.
B) We have moderately strong evidence that the acceleration is real,but essentially no idea what is causing it.
C) The acceleration is very important in the cosmos today,but the evidence indicates that it will eventually slow down,allowing the universe to recollapse.
D) The acceleration probably is not real,and what we attribute to acceleration is probably just a misinterpretation of the data.