Final answer:
The correct verb form to complete the sentence is "ofrezca".
Step-by-step explanation:
The correct verb form to complete the sentence is ofrezca. The sentence in English translates to: "I am not sure if this restaurant offers Puerto Rican food." The correct verb form should match the subjunctive mood used in the sentence and agree with the third-person singular subject "este restaurante". The third-person singular present subjunctive form of the verb "ofrecer" is "ofrezca".
Learn more about Verb forms in Spanish