Writers should avoid jargon because jargon
a. takes too long to use
b. limits what ideas can be explored
c. conveys too much information
d. is difficult for many to understand

d. Is difficult for many to understand.

Jargon refers to language that is very specific to a particular context, and is often not understood outside that context. Jargon is most often used to refer to technical language that belongs to a particular occupation. Therefore, texts that employ too much jargon might not be read outside of that particular group or industry as the language might be too difficult for outsiders to understand.

cause they were to dumb to get their college education to become a real   : )

the first, third, and last sentences are correct for plato.