DirectiOns: For the following questions, select the two
answer choices that, when used to complete the sentence, fit the meaning of the
sentence as a whole and produce completed sentences that are alike in
meaning. Studded starfish are well protected from most predators and parasites
by ______ surface whose studs are actually modified spines.
A. a vulnerable
B. an armored
C. an obtuse
D. a brittle
E. a concave
F. a rugged