There is discordance between the hint and the 'best answer' indicated.

The best answer was listed as " ... ravi de TE rencontrer" with the answer "...ravi de VOUS rencontrer" getting the strikethrough and relegation to the 2nd line! 

Both accepted, which is lso not quite right if 'vous' is needed in the social context.

(And the final transcript uses 'enchanté' alone, which although correct, would make the clue to use polite 'vous' redundant.)