TOEFL Reading: ETS-TOEFL阅读机经 - 736U1GVA3Q1N53ZDL$

Which of the following can be inferred from paragraph 4 about the fibrous membrane A. It served the same function as the gelatin coat. B. It was larger than the gelatin coat. C. It allowed amphibians to produce eggs as large as those of reptiles. D. It allowed for better transmission of oxygen.