Answer:
Himself
Explanation:
The baby boy saw himself in the mirror and started to cry .
What do you mean if you can give more details someone might be able to help you more.
The sentence that contains a boldface infinitive is D. Lisa wants TO GO.
It is easy to spot an infinitive - it is usually a combination of the word TO plus a verb.
A and C are incorrect because those are not infinitives, but rather prepositional phrases. B is incorrect because it is an infinitival phrase, rather than a single infinitive.