It was written almost single-handedly, with little financial or scholarly support.
Different parts of the excerpt prove the other answers wrong. Option A says it was produced by scholars but it says that it "was written with little assistance of the learned". The learned are people who have an academic or scholarly background. This quote also eliminates option C because it says that the author was curious and learned. There's no indication that this is true. We also don't see any evidence of it being the first dictionary to include simple, everyday words. The line that shows little financial support is when it says, "without any patronage". This means that there were no people financially backing the efforts of this dictionary.