Do to others as you would have them do to you. 的意思 选一个!

Do to others as you would have them do to you. 的意思 选一个!
A if you want somebody's help you hace to help him first
B you should do the things that others want you to do
C before you do anything ,think about what others do to you
D if you want others to do kind things to you ,you would better be kind to them