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.
This is a TED talk given by Karem Thompson
Explanation:
In her speech she talks about how fear is connected with the stories we had read. She says, first, we have to acknowledge that fear is an entire system of the brain.
Yet today, when we do not have to fear a saber-toothed tiger behind every tree, we are still telling ourselves that a critical level of danger may be right around every corner.
Now our stress is social, ethical, and financial, but our brain elevates the challenges to that same fear center. We have difficult family situations that need attention, but we avoid wading in because we are imagining the worst possible outcome.
B. He's good natured and possibly making a joke
