Here Are the Main Points for an Informative Speech on Hydrogen

Here are the main points for an informative speech on hydrogen fuel cells.
I. Hydrogen fuel cells were developed to provide a highly efficient form oenergy.
II. Hydrogen fuel cells produce power through an electrochemical reaction involving hydrogen gas.
III. Hydrogen fuel cells provide an economically and environmentally superior method opowering motor vehicles.
These main points are organized in __________ order.

A) causal
B) spatial
C) topical
D) reactionary
E) chronological