Final answer:
The answer is 'Lo siento, pero no puedo.'
Step-by-step explanation:
The correct answer is B. Lo siento, pero no puedo.
When you want to say 'I'm sorry, but I can't' in Spanish, you would use the phrase 'Lo siento, pero no puedo.' This translates directly to 'I'm sorry, but I can't.' 'Lo siento' means 'I'm sorry' and 'no puedo' means 'I can't.'
Here's an example sentence: 'Lo siento, pero no puedo ir a tu fiesta esta noche' (I'm sorry, but I can't go to your party tonight).
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