Question

they are (estar, feminine)
ellas
están
yo soy
ella es
ustedes
son

Explanation:

We need to conjugate the verb "estar" for the feminine plural subject "they" (ellas). The correct conjugation of "estar" for "ellas" is "están", and the subject pronoun for feminine plural "they" is "ellas". So the correct phrase is "Ellas están".

Answer:

A. Ellas están