Most argentinians use the pronoun vos instead of tú when talking to friends. in some cases, the verb in the vos form is different from the tú form; in others, it is the same. look at these questions with vos. can you guess what the tú equivalent is?
1. y vos, ¿cómo estás?
2. ¿de dónde sos?

hi! im argentinian, gonna try to help you and i hope you can understand me (my inglish is not very good)

Explanation: well, in the case of "y vos, ¿cómo estás?"  You can also use the "¿y vos, cómo andás?" (the literal meaning of "andás" is "you walk" but in this sentence it replaces the verb to be, so you must answer how you feel , sometimes it happens that some tourists answer this question by saying "with their feet" which creates quite funny situations.

in the case of ¿De dónde sos? It is generally said that way, but in some cases they can also ask you with a, "De dónde venis?" = (Where are you from?)

i just checked their website, the mall is 1.8 million square feet.

the correct answer would be d, almost 2 million square feet.