In passage 2 one weakness of the Berkeley study is that the researchers A. Focused on power fade instead of energy capacity fade.
B. Looked at battery performance beyond the “end of life” threshold.
C. Used one type of electric vehicle to generalize about all electric vehicles.
D. Relied only on U. S drivers.

One sec let me get the answer.

The answer is symbolism . 

Common knowledgea laptop computer is more portable than a desktop computer. needs documentationone of the themes in i heard the owl call my name is the dying of the tribe’s way of life. common knowledgecell phones communicate using satellites orbiting the earth. common knowledgerobert frost wrote poetry.needs documentation“once upon a midnight dreary, while i pondered, weak and weary,” needs documentationa scientist’s opinion of the global warming issue