We do everything our father tells us to do, we'll get a special treat.

which revised form of this sentence, with added transition words, would it to flow more smoothly?

a) if we do everything our father tells us to do, then we'll get a special treat.

b) and we do everything our father tells us to do, we'll even get a special treat.

c) while we do everything our father tells us to do, we'll soon get a special treat.

d) although we do everything our father tells us to do, we'll still get a special treat.