Why doesn't Jill go shopping?

题干

A：Because she wants to look at her sister．

B：Because she wants to look for her sister

C：Because she has to look after her sister．

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C

人民网为了解百姓对时事政治关心程度，特对18～35岁的青年人每天发微博数量进行调查，设一个人的“日均发微博条数”为m，规定：当m≥10时为甲级，当5≤m＜10时为乙级，当0≤m＜5时为丙级，现随机抽取20个符合年龄条件的青年人开展调查，所抽青年人的“日均发微博条数”的数据如下：

0	8	2	8	10	13	7	5	7	3
12	10	7	11	3	6	8	14	15	12