15. The correct answer depends on the gender of the noun "bebida" in Spanish, which is feminine.
A. "Tráela" is the correct option because it means "Bring it (feminine)"; the word "la" agrees in gender and number with "bebida" which is feminine.
B. "Lo trae" means "He/She brings it (masculine)", and it is incorrect to use "lo" to refer to "bebida" which is feminine.
C. "Tráelo" means "Bring it (masculine)", and it is also incorrect because "bebida" is feminine.
Therefore, the correct answer is A. "Tráela".
16. The correct answer is B. "No la traes", which means "You don't bring it (feminine)".
In this case, the word "la" agrees in gender and number with "bebida" which is feminine, and it is placed before the verb "traes" to indicate that the action of not bringing the drink applies to it.
Option A, "No traesla", is incorrect because it separates the verb "traes" from the direct object pronoun "la", which should be attached to the verb to form "la traes".
Option C, "No la traigas", is also incorrect because it uses the imperative form "traigas" (which means "bring") instead of the indicative form "traes" (which means "you bring"). Additionally, the imperative form "traigas" implies a command or request to bring the drink, which is not the intended meaning of the sentence.