B) cell because all living things are made up of cells
A, B, D, and E are all wrong. C is the right answer. C is a compound.
A, B, D and E are not unique. A pure substance is something with unique characteristics and if it can be broken down, the result is two or more pure substances. AKA only compounds and elements. This is an easy question so try to study.
<span>Orphan records are records whose foreign key value does not refer to a primary key value. Orphan records are very common in database relationships. The process used to remove and fix orphan records is called scrubbing the database.</span>
Density tells you the mass of exactly one unit of volume any given substance.
The answer is C. 13.6
