Correct option is A
Explanation:
· The correct phrasal verb is
"sold out", which means all items (here, tickets) have been purchased.
· "Sold away" is not a standard phrase in this context.
Correct Sentence: All tickets of the FIFA World Cup have been sold out.
Phrasal Verb Usage:
·
Sell out = to sell all of something
·
Example: The concert tickets were sold out within an hour.