Itis important to choose a topic on which at least some research exists (that youare able to access) and which is not overly complex. Please select from thefollowing example topics the more actionable and researchable one. 
A、DNA 
B、Alien DNA
C、Human DNA
Itis important to choose a topic on which at least some rese - 3 Argumentative... - 大学英语写作(二)——说明文、议论文 - 融优学堂 | 大学网课搜题引擎