In advanced English lexicography and etymological precision, words often derive their specific meanings from classical roots, requiring exact one-word substitutions and flawless orthography. Consider the following four advanced propositions: I. The one-word substitution for 'a person who possesses a morbid, insatiable, or excessive desire to steal items of little or no value, typically without financial motive' is **kleptomaniac**, and its correct spelling follows the Greek root 'kleptein' (to steal). II. The term **iconoclast** refers precisely to a person who attacks cherished beliefs, traditional institutions, or established dogmas, whereas a person who resolutely refuses to compromise or change their opinions even under intense pressure is termed an **obstinate** or **intransigent** individual. III. The orthographically challenging word designating 'the scientific study of the origin, evolution, and structural development of languages' is spelled **etimology**, and its adjectival form is etimological. IV. A government or administrative system in which power is concentrated in the hands of a small, privileged ruling class—often distinguished by wealth, family lineage, or military dominance—is correctly termed an **oligarchy**. Identify the option that correctly evaluates the lexical, semantic, and orthographic validity of propositions I, II, III, and IV according to standard English lexicography and Orthography principles.