请教一道70的段阅读

txjpmUID：3797729

Many cultural anthropologists have come to reject the scientific framework of empiricism that dominated the field until the 1970s and now regard all scientific knowledge as socially constructed. They argue that information about cultures during the empiricist era typically came from anthropologists who brought with them a prepackaged set of conscious and unconscious biases. Cultural anthropology, according to the post-1970s critique, is unavoidably subjective, and the anthropologist should be explicit in acknowledging that fact. Anthropology should stop striving to build a better database about cultural behavior and should turn to developing a more humanistic interpretation of cultures. The new framework holds that it may be more enlightening to investigate the biases of earlier texts than to continue with empirical methodologies.

1. The author implies which of the following about most cultural anthropologists working prior to the 1970s?
A. They argued that scientific knowledge was socially constructed.
B. They were explicit in acknowledging the biases inherent in scientific investigation.
C. They regarded scientific knowledge as consisting of empirical truths.
D. They shared the same conscious and unconscious biases.
E. They acknowledged the need for a new scientific framework.

正确答案是c，能不能解释一下c为什么对，还有d为什么错了。
谢谢！

onelittlemajiaUID：3795546

我选C.
不过这篇挺抽象的，我解释的不一定完全正确。
第一句 Many cultural anthropologists have come to reject the scientific framework of empiricism that dominated the field until the 1970s and now regard all scientific knowledge as socially constructed.
说明1970s前"scientific framework of empiricism that dominated the field "
后面说
“Cultural anthropology, according to the post-1970s critique, is unavoidably subjective”
“Anthropology should stop striving to build a better database about cultural behavior and should turn to developing a more humanistic interpretation of cultures. The new framework holds that it may be more enlightening to investigate the biases of earlier texts than to continue with empirical methodologies. ”
我理解是 70s后人类学家认识到 人类文化 是主观的有bias的；
之前没意识到主观性，scientific empiricism 占主导。
D错因为70s后才认识到bias的，之前没有。

虽然这题我做对了，但是看了大概三遍，这些词太抽象没概念。