Teacher Peter writes a long expression $10-9+8-7+6-5+4-3+2-1$. Four kids rewrite the expression in another way. Who is correct? 
选项为:A:Ben: $10+9+8+7+6-5-4-3-2-1$  B:Bill: $1-2+3-4+5-6+7-8+9-10$  C:Julie: $2+4+6+8+10-1-3-5-7-9$  D:Judy: $1+3+5+7+9-2-4-6-8-10$  E:None of them is correct.  请回答其中一个选项.