Question #N562

In the early 1900s, the first commercially successful electric washing machine was marketed as a labor saving device that would free women from the drudgery of hand-washing clothes. However, the early machines were often unreliable and difficult to use, requiring a lot of maintenance. Despite these problems, the washing machine transformed the lives of many women, offering them more time for other activities.

Which choice provides the best transition between the first and second sentences of this passage?
A. For example,
B. However,
C. In addition,
D. Therefore,