The right option is; Surprisingly
Surprisingly is the transition used to emphasize a point in the passage.
Transitions are the words or phrases placed between paragraphs and sentences in a passage to relate words to ideas or to emphasize a point. Transitions help readers to progress from one important idea or details to another, and it also shows the connection between the main idea and the support the author provides for those ideas. There are several types of transitions with different functions. Examples include similarly, likewise, for, consequently, nor, therefore etc.
