Do you have any pic? That will be helpful and that way I can answer that to you :)
The answer is D. A verb that starts with "to" is in an infinitive verb form. It should be noted that a verb in this form does not function as a verb instead it functions as another part of speech. Infinitives can function as adverbs, adjectives or as nouns.
The method is called deductive reasoning. In it, the thinker starts from the most general claim, which is obvious in itself. Then he asks more questions, each of which is more specific and particular. Thereby he finally reaches the answer. The answer which is found with this method has the least chance of being false. Aristotle is the philosopher who invented the term.
C. over a period of six months, the turbine produced up to 211 gallons of water per day.
Ok, so now Leah has to go back to the bus and claim her purse.