[单选题]
What can we learn abo 6mq )3dlk pyokpj5jf (8s3(bkut 2 w)mz wuppi:k/jpi,; marriage vows from the passage?
A. They may not guarantee a lasting marriage.
B. They are as binding as they used to be.
C. They are not taken seriously any more.
D. They may help couples tide over hard times.
