Final answer:
Brontosaurus is a synonym for Apatosaurus, which is the correct name by priority in scientific naming.
Step-by-step explanation:
Yes, Brontosaurus is indeed a synonym of Apatosaurus, making the statement A. True. These two names have a history that involves some taxonomic confusion. The name Apatosaurus was published first, in 1877 by the paleontologist Othniel Charles Marsh. Later in 1879, Marsh described another set of fossil remains as Brontosaurus, but it was later determined that those remains were from the same genus as Apatosaurus. Given this, the name Apatosaurus has priority, according to the rules of scientific naming. This means that while both names have been used historically, Apatosaurus is the correct name to use.