Read the following passage and answer the question.
OEDIPUS: As for myself, no matter how base born my family, I wish to know the seed from where I came. Perhaps my queen is now ashamed of me and of my insignificant origin.
What is the best meaning for the word base in this context?
a) supporting structure
b) fundamental principle
c) armed forces installation
d) low, corrupt, and/or dishonorable