Which of the following table manners is considered appropriate in Britain?

A、Do not start eating until everyone is served in a restaurant.;
B、When finishing eating, just cross the knife and fork on the plate with the fork over the knife.;
C、When going to a restaurant, if you wear gloves, just take off the gloves and put them on the table.;
D、When invited for dinner at a friend's home, just take a seat wherever you would like.