Answer:
How do you fill a “I will pay”? This question dosen't really make sense.
Answer:
yo soy una niña
tu eres mi maestro
el es muy alto
ustes es muy ambisioso y inteligente
ella es bonita
Mi amigo y yo escribimos una carta
Hoped I helped
As the sentence is presented in plural form, the correct option would be option C. "Dudo que los maestros sean simpáticos". Because the subject "maestros" must agree in number with the verb "ser". In the case of A "son" is presented in the singular form and in case B, the verb "ser" is presented in the infinite form.