Q:Information: - Ratt (stylized as RATT) is an American heavy metal band that had significant commercial success in the 1980s, with their albums having been certified as gold, platinum, and multi-platinum by the RIAA. The group is perhaps best known for hit singles such as "Round and Round" and "Lay It Down", tracks that ranked on Billboard's top 40 at No. 12 and No. 40, respectively, as well as other songs such as "Wanted Man", "You're in Love" and "Dance". Along with groups such as friendly rivals Motley Crue, Ratt has been recognized as instrumental in the formation of the early 1980s Los Angeles glam metal scene, also known as "hair metal" or "pop metal". - Amir Davidson (stage-named Amir Derakh), (born June, 20, 1963) is an American musician. He is currently the guitarist and the synthesizer player for the band Julien-K, and guitarist for the band Dead by Sunrise. He was once a guitar/synthesizer player in the rock band Orgy, and has also played guitar in the bands Rough Cutt and Jailhouse. - Glam metal (also known as hair metal and often used synonymously with pop metal) is a subgenre of heavy metal and hard rock. It often combines elements of those genres with blues, adding catchy pop-influenced hooks and guitar riffs, while borrowing from the fashion of 1970s glam rock. - Matt Thorne , a.k.a. Matt Thorr , is a bassist who has played in the glam metal band Ratt , Rough Cutt , and Jailhouse . He co-wrote the song '' Back For More '' with Stephen Pearcy on Ratt 's album Out of the Cellar . He currently owns MT Studios for BlueThumbProductions in Burbank , California where he has produced , engineered and mixed albums for artists such as '' The Eels '' and '' Trapt '' . - Motley Crue was an American glam metal band formed in Los Angeles, California on January 17, 1981. The group was founded by bass guitarist Nikki Sixx and drummer Tommy Lee, lead singer Vince Neil and lead guitarist Mick Mars. Motley Crue has sold more than 100 million records worldwide including 25 million in the US, making them one of the world's best-selling bands of all time. - Rough Cutt is an American heavy metal band from Los Angeles, California who released 2 studio albums on Warner Bros. Records in the mid-1980s. Rough Cutt never achieved the commercial success enjoyed by many other L.A. bands of that time but various members went on to success in other groups, including Jake E. Lee with Ozzy Osbourne, Amir Derakh with Orgy, Paul Shortino with Quiet Riot, and Craig Goldy and Claude Schnell with Dio. After reading the paragraphs above, we are interested in knowing the entity with which 'matt thorr' exhibits the relationship of 'instrument'. Find the answer from the choices below. Choices: - bass - guitar - synthesizer
A:
guitar