请根据下面短文回答下列各题： Dear Students, I am happy that you are now in America．Iam hap

py that you have made new friends from around the world．All of youare growing every day． Like many people, you decided to come toAmerica．You are learning a new language and a new culture(文化)．It takes a lot of time and hard work．Youare doing great! Welcome．And thank you! Id like to give you some simple advice(忠告) 1 ) Learn to speak up．Ask for help whenyou need it．Most Americans are friendly and helpful．2 )Dont be afraid ofmaking mistakes．You cannot learn without making mistakes． 3 )Get out and meet people． 4)Dont forget your dreams(梦想)．Work hard for the things that are importantto you． 5 ) You are going through manydifficulties now．But remember that these difficulties will make you stronger for the future． 6) Smile ! You came from many different parts of theworld to this class．I am very glad to be your teacher． I wish each of you well in thefuture． Your teacher, Mr．Charles Kaspar What makes the teacherhappy？

A.The students have made newfriends in America．

B.The students have madefriends with him．

C.The students have taken hisadvice．