Based on his socio-psychological research, Howard Gardner proposed that "Intelligence is comprised of multiple intelligences - a model that claims there are eight different types of intelligence that are independent of each other."
In his research findings, Howard Gardner listed these types of intelligence which forms his multi-intelligence theory:
He also suggested the possible existence of ninth intelligence, which he described as existentialist intelligence.
Howard Gardner documented his research findings in a 1983 book titled "Frames of Mind: The Theory of Multiple Intelligences."
Hence, in this case, it is concluded that the correct answer is option D.
Learn more here: https://brainly.com/question/19110596