假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两赴，每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号（八），并在其下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均限一词。

2．只允许修改10处，多者（从第11处起）不计分。

When I was a child, I spent more than ten years learn the violin．Therefore, I couldn't understand "real music"．After I  graduated at high school, a friend of mine suggested that we started to learn the guitar because we all thought it was cool．l will never forget the day on that we went to buy guitars in the guitar store． There I saw a guitar player playing the guitar, which I really enjoyed．He became my the first guitar teacher．It took me such a long time choose a guitar among several wonderful model．Now the guitar is the most importantly part of my life and I practice it every day.

A公司为扩大生产能力，经公司董事会讨论后决定收购B公司。从决定主体角度看，这种决策属于( )

A．集体决策

B．目标决策

C．经营决策

D．确定决策