[单选题]
What can we learn about marriage vowono1du+. n )u ulvct.3a itc4r*/ 7hhas from the pas /9ve5d7ch 4f3dpa aessage?
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.
