先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。
Fourteen-year-old Emma Peters is talking about her coming summer holidays．
"Soon it will be the summer holidays again．I'm not going away with my parents this year but I don't1．I'm going to2my time with two of my classmates，Bella and Lou．
We've just started a band (乐队)．We call it Sunshine．I play the guitar(吉他)and sing．Bella plays the piano and Lou plays the drums．We 3in Lou's dad's garage(车厍)and we also play in small coffee shops．We're 4 very good friends．We love and help each other．I was in a different band last year but that wasn't so much5.No one wanted to practise．
"We've written several songs and we have our own website (网站)．Over the summer holidays we are going to make a CD 6ten or maybe twelve songs on it．We're not quite sure yet．We haven't finished writing all the songs，7 we've decided on the name of the CD．We're going to call it The Red Room．The CD may not make8famous，but that doesn't matter—we just enjoy our music and hope to 9it with other people．I can't think of a better10to spend the summer holidays．”
（单位：万元）与年产量
（单位：万件）的函数关系式为
，则使该生产厂家获得最大年利润的年产量为