I think b should be the answer
The type of verb that typically includes the word "to" is C. infinitive.
<u>The infinitive is the base form of the verb. Moreover, the present infinitive can have the form of "to-infinitive" </u>or the form of the "zero infinitive" (without "to"). <u>The first form is frequently used</u> and, for that reason, the infinitive typically includes "to". Furthermore, the "to-infinitive" can function as subject of the sentence, direct object and even as object complement. Some of the verbs that can be followed by a "to-infinitive" are refuse, propose, want and decide.
D. it is pretty simple and is to easy or high sxchool
Recognizing there is a problem
