Answer:
adjective
adjective: rudimentary
involving or limited to basic principles.
"he received a rudimentary education"
Similar:
basic
elementary
introductory
early
primary
initial
first
fundamental
essential
rudimental
Opposite:
advanced
relating to an immature, undeveloped, or basic form.
"a rudimentary stage of evolution"
Similar:
primitive
crude
simple
unsophisticated
rough
rough and ready
makeshift
rude
vestigial
undeveloped
incomplete
embryonic
immature
nonfunctional
abortive
obsolete
Opposite:
sophisticated
developed
You should chose D. B. would also work, but D. is best. Always put a comma before a name.
A is the most logical answer.
