请各位帮忙完成下面的四选一.并帮忙解释一下!我想知道这句子中,每题选项词汇的区别!

C

demonstration
[7demEns5treiFEn]
n.
示范, 实证

demonstration
dem.on.stra.tion
AHD:[dµm”…n-str³“sh…n]
D.J.[7dem*n6strei.*n]
K.K.[7dWm*n6stre.*n]
n.（名词）
The act of showing or making evident.
证实：显示或制造证据的行为
Conclusive evidence; proof.
证明：无可置疑的证据；证明
An illustration or explanation, as of a theory or product, by exemplification or practical application.
验证：对理论或结果等用例子或实际应用说明或解释
A manifestation, as of one's feelings.
表示：表露，例如感情
A public display of group opinion, as by a rally or march:
示威：一种表达集体意见的公开行动，如通过集会或游行的方式：
peace demonstrations.
和平示威

frequency
[5fri:kwEnsI]
n.
频率, 周率, 发生次数

description
[dis5kripFEn]
n.
描写, 记述, 形容, 种类, 描述

description
de.scrip.tion
AHD:[d¹-skr¹p“sh…n]
D.J.[di6skrip.*n]
K.K.[d!6skr!p.*n]
n.（名词）
The act, process, or technique of describi