Which of the following transitional phrases is appropriate for addition?

The phrase "Furthermore" is an appropriate choice for addition because it serves as a transitional phrase that adds information or emphasizes further points in a discussion or argument. When you want to introduce additional evidence, examples, or arguments that support the point being made, "furthermore" effectively signals to the reader that there is more related content to consider. This makes it a strong choice for enhancing the flow of a text when expanding on existing ideas or introducing additional relevant points.

In contrast, the other options indicate relationships that are different from addition. "In contrast" suggests a comparison that highlights differences, while "however" and "nevertheless" indicate opposition or contrast to previously stated information. These phrases serve different purposes in writing, primarily involving shifts in thought rather than the continuation or addition of ideas. Therefore, "furthermore" stands out as the correct choice for promoting additive transitions in text.