1. Which one of the following most accurately expresses the main point of the passage?
(A) Calvaria major germination, though rare, is probably adequate to avoid extinction of the species. - Limited in scope. The main point of the passage is to counter Temple's hypothesis.
(B) The appeal of Temple’s hypothesis notwithstanding, the scarcity of Calvaria major is probably not due to the extinction of the dodo. - ok. The first part is a modifier "The appeal of Temple’s hypothesis notwithstanding." "notwithstanding" means in spite of. Meaning, in spite of the appeal to Temple's hypothesis, the dodo is not the reason for the scarcity of Calvaria.
(C) Temple’s experimentation with Calvaria major pits, though methodologically unsound, nevertheless led to a probable solution to the mystery of the tree’s decline. - No the author is not supportive of this.
(D) Temple’s dramatic but speculative hypothesis, though presented without sufficient supporting research, may nevertheless be correct. - No.
(E) Calvaria major would probably still be scarce today even if the dodo had not become extinct. - This hypothetical situation is not the main point. The main point of the actual situation citing facts to counter Temple's hypothesis.