The correct answer is D. Between
Explanation:
An infinitive is the basic form of a verb compound by the preposition "to" and the bare verb, for example, to eat, to run, to go or to cook. In the case of a split infinitive a word or groups of words is inserted between the preposition "to" and the bare infinitive which is usually an adverb, for example, "she was advised to slowly run" in which "to run" has been separated or split by the adverb "slowly". Thus, a split occurs if one or more words are inserted between the two parts of an infinitive.
<span>There are varying degrees of strength and weakness in inductive reasoning, and various types including statistical syllogism, arguments from example, causal inferences, simple inductions, and inductive generalizations. They can have part to whole relations, extrapolations, or predictions.</span>
Since its a sibling, and siblings tend to be in a person's close circle of people, informal speech is used.