Question

you all are (estar, spain)
vosotros estáis
ellos son
tú eres
él es

Explanation:

To conjugate "estar" for "you all" (in Spain, the familiar plural "vosotros" is used), the correct form is "vosotros estáis". "Ellos son" uses "ser" (wrong verb), "Tú eres" is for singular "you", and "Él es" is for "he is". So the correct option is the red one with "Vosotros estáis".

Answer:

A. Vosotros estáis