ETS Official Guide Quant Question Set 1 Q.2

image
Based on the diagram, what assumptions are fair to make?
I marked the ans as D, because I thought it wouldn’t be safe to assume that the line passes through both corner vertices.
Can I assume that the line divides the zone goes from one corner vertex to the other?
Generally, what can we assume based on diagrams in QC questions?

image

Read ETS Math Convention : LINK

Thanks