Which statements about the Meisenheimer complex formed from 1-fluoro-4-nitrobenzene and methoxide are correct?

1. AThe negative charge is delocalised onto the oxygen atoms of the nitro group
2. BWith 1-fluoro-3-nitrobenzene the negative charge cannot be placed on the carbon bearing the nitro group, so the corresponding complex is much less stabilised
3. CFluoride is lost in the same step in which methoxide adds
4. DThe ring carbon bearing fluorine is $s{p}^3$ hybridised and also bears $\mathrm{OCH}{}_3$