Answer: B. Pueda
Step-by-step explanation:
The correct answer to fill in the blank in the sentence "Dudo que yo ________ ir a la fiesta" is B. pueda.
The sentence "Dudo que yo pueda ir a la fiesta" means "I doubt that I can go to the party" in English.
In this case, the verb "poder" is used in the present subjunctive form "pueda" because the main verb "dudar" (to doubt) expresses doubt or uncertainty. The present subjunctive is used to convey doubt, possibility, or hypothetical situations. It is important to use the correct verb form to match the context of the sentence.
For example, if you were to choose option A, "poder," it would be incorrect because it is in the infinitive form and does not match the present subjunctive tense needed in the sentence.
Option C, "puedo," is also incorrect because it is in the present indicative form and does not convey doubt or uncertainty.
Option D, "puedas," is also incorrect because it is in the second-person singular form, which does not match the subject "yo" (I) in the sentence.
Therefore, the correct answer is B. pueda, as it is the appropriate form of the verb "poder" in the present subjunctive tense to match the context of the sentence.