Sean on July 8, 2019
If you change MOST to SOME, then B is a clear fit.
But I don't think the stimulus supports that MOST climatologists have SUBSTANTIAL MOTIVE to pursue climate research.
Yes, you provide a justification: "there is no greater", but that does not exclude NON-substantial motivations.
Accepting that a breakthrough would grant climatologists world renown does not mean that is the motivating factor for MOST of them.
Do you even need motive to do work? Not aways.
Does that make sense?
MOST just seems like a reach for me...
This question actually feels like it should be an assumption question; fill in the hole that allows the stimulus to grant "MOST" in the conclusion.
Ravi on July 8, 2019