The bulleted subheadings allow the reader to understand what about the text?
A) How aquariums are different from the wild and what kinds of fish and creatures can survive in an aquarium.
B) That there are multiple important parts of a successful aquarium and that each part takes a bit of explanation.
C) Why aquariums are important to the world of science to the understanding that scientists seek in the natural world.
D) How much each part of an aquarium costs with detailed cost breakdowns, material lists, and suggestions for where to buy.