In the setup, I made three diagrams. Review the setup and draw them yourself if you’re unsure why they have to be true.
In all three scenarios from the setup, J and K could be morning or afternoon. That’s why they had reversible lines.
Have a look at the diagram in question 3 as a reminder of what the setup diagrams look like. JL and KR are reversible.
If J and K must be in the morning, then JL and KR are no longer reversible. L and R must be in the afternoon.
And that’s all we can say.
A is CORRECT. If J is in the morning, then L must be in the afternoon, not the morning.
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