Final answer:
The question does not provide sufficient context to accurately define the types of arrowboards mentioned. However, a consideration is made with spectral types of main-sequence stars and the representation of forces in physics. Please provide more specific details about your question.
Step-by-step explanation:
The question is a bit unclear because it does not provide enough context about the types of arrowboards you're referring to. However, given the information available and as a basis of comparison, let's consider that these type A, B, C, and D could be somehow correlated with the different spectral types of main-sequence stars (type-O, type-B, type-A, type-G, and type-M). Main-sequence stars are a continuous and distinctive band of stars that appear on plots of stellar color versus brightness. These can change and contract over time.
Moreover, the concept of arrow direction and length is used in physics to represent forces. Arrow pointing right, labeled F, for the total force, and an arrow pointing right, labeled f, that is of equal length or shorter than F, for component forces.
Again, the original question might be referring to other types of 'arrowboards' or diagrams, so without further information, this is a general understanding and classification that can be given.
Learn more about Arrowboard types