[Solved] Research and development expense for a given period includes: A) The full cost of newly acquired equipment that has an alternative future use. B) Depreciation on a research and development facility. C) Research and development conducted on a contract basis for another entity. D) Patent filing and legal costs. Gay Activity: Refers to sexual or romantic activities between individuals of the same sex. Unidimensional Model: A theoretical approach that simplifies complex phenomena or behaviors to a single dimension for analysis or interpretation. Homoeroticism: The representation or expression of same-sex affection or desire, especially in literature or art. Heteroeroticism: Sexual attraction or erotic behavior between individuals of the opposite sex.