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Los no usan computadoras. a. contables c. secretarios b. programadores de informática d. albañiles

Does anyone know what my spanish teacher means by this? i need to use plural forms of the verb ser. and she asked me to use a couple of adjectives to describe the boys collectively and then the girls collectively?

Which indirect object pronoun correctly completes this sentence? ayer fui a nuestra primera clase del año y el profesor habló de las reglas de la universidad. a. les b. le c. nos d. me