“But if they arrived on your given hour, you'd have to be there…”

Para transformar a frase em um fato concreto, a alternativa correta seria


a) Had they arrived on your given hour, you’d have been there…

b) If they’d arrived on your given hour, you’d have being there…

c) Had they arrived on your given hour, you’d must be there…

d) If they arrive on your given hour, you must be there…

e) If they’d arrive on your given hour, you’d have being there…