This question places R alone. That means the group structure will be 1-2-3. R alone, two others in markets, and three in a third group. Like this:
I’m purposefully leaving off the group labels, because I want you to think about how to separate the assistants into the three groups. For example, Y/V are split between the two other groups, because rule 3 says they can’t be together.
Next, TS is hardest to place. Needs two spaces. So, TS must go in the group of three:
That leaves only Z left to place, and only one spot open:
So we have figured out the entire distribution of assistants between the 1-2-3 groups! And guess what, that solves the question. We know that the group of two is Markets (rule 1). So, we know for sure that Z is in markets. D is CORRECT.
You could also have gotten the right answer by making diagrams figuring out which of the groups above go in L, M and P. But it would have taken longer. And on logic games you should always learn the fastest method.
(Adding in the three groups would have complicated things by forcing you to think about whether YZ were in P together, for example.)
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