How to dress for a high school dance (girls )<br>Go for a formal gown. If you are attending a formal dance like a winter formal or prom, you should go for a formal outfit. This means a formal dress that is floor length or no shorter than three inches above your knee, with a modest neckline.

Based on that paragraph can we conclude that this sentence is true?
neckline modesty is a must

Options:
 - Yes;
 - It's impossible to say;
 - No;
Yes