Ustedes is formal and should be used when talking to someone you’re not so familiar with, like a stranger, or someone that should be addressed with respect, like an elderly person.
It's A
Me sorprende que me acuses de no tener confianza en ti
Answer:
Sirven is the right answer.
Explanation:
When conjugating -ir verbs to ustedes, you replace -ir with -en.
La respuesta es
D. Tienes ansiedad