The correct answer is b. la
That is because "ropa" which means clothes or clothing is a feminine noun in the Spanish language, so when the first person says that they have to buy clothes, the second one uses "la" because "la" is used for the feminine "ropa". "lo" would be for masculine while "los" would be for masculine plural".
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D) sencillo ( one-way ticket)
I've taken Spanish for Spanish Speakers 2 and AP Spanish Language & Culture so I hope I was able to help you!
B . Mexico City
Explaintion :
Because lake Texcoco is there
