[Solved] Which of the following sentences best emphasizes the real subject? A) There are four ways in which investment in clean energy can be increased. B) Investment in clean energy can be increased in four ways. C) It is hoped that these changes will improve the usability of the website. D) There is a possibility that the use of these techniques will result in cost savings. Fellatio: null Anal Eroticism: Sexual activities involving the anus. Cunnilingus: Oral sex performed on female genitalia, involving the use of the mouth, lips, and tongue to stimulate the vulva or vagina. STD: Short for sexually transmitted disease, it refers to infections that are primarily passed through sexual contact.