Final answer:
The appropriate noun to fill in the blank in the sentence is 'dinero en efectivo', which means cash in Spanish.
Step-by-step explanation:
The appropriate noun to fill in the blank in the sentence is dinero en efectivo, which means cash in Spanish. This is the correct answer because the sentence says 'I am not going to pay with a credit card. I am going to pay with...', implying that the speaker will pay with something other than a credit card. Option B, 'dinero en efectivo', is the Spanish term for cash, which fits the context of the sentence.
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