This question has options. Answer the question about text:

I did n't have time to post yesterday ( or much at all recently for that matter , ) but M. and I celebrated our fifth anniversary . We drove up to Santa Fe to try out a private tub at Ten Thousand Waves , then came back down to Albuquerque for a sushi dinner at Sumo Sushi . It 's hard to believe we ' ve been together so long already .

What may be the reason for celebrating an anniversary ?
Choose from: [i] Because marriage is hard . [ii] Because they lived for another year . [iii] Because everyone the know is getting divorced . [iv] Because this is a special feat as they can not stand each other .
[i]