Answer: Comparten
This is because this is a conjunction so when using Ellos/Ellas/Ustedes (They) you would change the ending to be en.
I would think D) nos relajamos because nosotros is plural and means we. And nosotros used -amos or -imos.
1. El menú, la cuenta
2.propina
3.el pollo, la sal
4.pone, levanta
5.vinagre?
6.mariscos