which answer identifies the infinitive phrase in the sentence?
she was so tired that she forgot to announce the time of next week's meeting.
that she forgot
to announce the time of next week's meeting
forgot to announce
was so tired

to announce the time of next week's meeting

Explanation:

Infinitive phrases begin with the full infinitive form of a verb, and may also consist of objects and modifiers. In the example sentence, the infinitive phrase works as a noun phrase, since it is the direct object of the verb forgot.

The other choices are incorrect because they do not begin with a full infinitive verb.

because it's a cool name

explanation:

to not go near anything hot