Which represents the most appropriate tone to use if writing a text message to a friend inviting him to a party?
a) what's up? there's a party later if you want to come.
b) hi. accompany me to the party that takes place later on.
c) hello. would you be so kind as to accompany me to a soiree next week?
d) i plan to attend a gathering later this evening and would be honored if you would join.