Below are two sentences. Which one of the following possibilities correctly combines them usingan adjectival clause? John is a blues singer. John lives in Pittsburgh. O John is a blues singer; he lives in Pittsburgh.
O John is a blues singer, and he lives in Pittsburgh.
O A blues singer, John lives in Pittsburgh.
O John, who lives in Pittsburgh, is a blues singer.

invention of the washing machine

in the past, people used sticks and stones or scrub boards to clean their clothing. as it was sweaty, backbreaking work, we owe a world of to james king because he created the model for the modern washing machine in 1851. the most important issue was that this machine cleaned clothes while a person cranked the handle. doing this made people who used it develop strong muscles in their arms. later, in 1908, alva j. fisher created an electric washing machine named thor. this one was not the first automatic washing machine. however, it was one of the most popular models at the time.

the students want to see the great sphinx of giza, which is very popular with tourists.