Answer:
that they are apart of the same species
A scientific hypothesis is an educated guess that is made about an observation based on the prior knowledge of the scientist. Hypothesis are always testable.
An hypothesis can be tested through experimentation and it can also be tested through deductive methods.
C, the first two don't make sense and the last one would support the opposing view point.
all living things are composed of cells
cells are the basic units of structure and function in living things
all cells are produced from other cells