[不定项选择题]Ron was an engineer.He planned a change and tried the new job of teaching kids how to swim.Ron′s easy?manner soon made him a full-time employee at the swim school. Now,the 40 hours he works a week takes in weekends,early mornings and late afternoons.He earns around?25%less than he did in engineering.But,at 49,he says he has never been happier."I′ve had a drop in pay,but I′ve?cut back on spending,too.I seldom drive to work so don′t have to pay as much for petrol（汽油）.I don′t drink as much.I go walking in my lunch break and I′ve lost 20 kilos.I love going to work.The whole family is a lot happier." When one of his brothers called,offering to help him find"a real i oh",he answered,"I don′t care.I know what?I′m doing is good." He admits it was fearful making such a big change when there was the mortgage（分期付款）to pay and kids to clothe and feed,but in the end he feels it is a simple choice."If you′re in a job you don′t like,get out.Money′s not?everything.If you don′t like it,change—find something you′re going to be happy with." What′s Ron′s advice to the readers?
A.Stick to the job if you have kids to raise.
B.Change the job if you don't like it any more.
C.Stick to the job if you have mortgage to pay.
D.Change the job if you don't get enough money.