I am sorry, I do not know the answer, but I need to answer this, not for the points, but I have tech issues, i am soooo sorry about this truely
¡Hola!
Which part of the sentence is not correct ?
Est<em>as</em> muchachos altos son los hermanos de Rosa
==> Estas = FALSE
Estos muchach<u>os</u> alt<u>os</u> son l<u>os</u> herman<u>os</u> de Rosa
with "Estas" ==> <em>Estas muchachas altas son las hermanas de Rosa</em>