Which answer correctly identifies the underlined words in the sentence?

then she decided what she really wanted was to teach.

a.
infinitive phrase

b.
participial phrase

c.
infinitive

d.
participle
to teach is underlined

in this text, paine use the word “ye” several times in order to  capture  the  attention of the colonists who   haven't understand the   importance and urgency of his cause. the word "ye" that is the plural of   "thou" is used to call the colonists attention and make the fight for the cause.