If / you / visit / An Giang Province / around September / October / you / take part / the Cow Racing Festival. A. If you visit An Giang Province around September and October, you took part in the Cow Racing Festival. B. If you will visit An Giang Province around September and October, you take part in the Cow Racing Festival. C. If you visited An Giang Province around September and October, you should take part in the Cow Racing Festival. D. If you visit An Giang Province around September and October, you should take part in the Cow Racing Festival.