Question

so many devices today depend on touch - screen technology. but who invented it and how? a man named e. a. johnson is recognized as being the first to help develop the technology in the 1960s. johnson did this by sending a faint electrical current through a thin metal sheet of copper. he realized that by pressing down on the metallic surface with a finger or special pen, he could cause an interruption in the electrical current. sensors placed near the surface would detect and record exactly where the interruption in the current took place. thanks to johnsons work and the contributions of many others since, tablet and smartphone users can now interact with their devices with just the touch of a finger. based on the passage, which best describes how the earliest touchscreen technology worked? the touch of a finger broke the flow of electricity across a metal surface, which sensors then picked up. the touch of a finger generated an electrical current on a metal surface, which sensors then interrupted. the touch of a finger triggered sensors to quickly pass bits of data across a metal surface. the touch of a finger caused sensors to shut down the flow of electricity and data across a metal surface.

Explanation:

The passage states that Johnson sent a faint electrical current through a thin metal sheet of copper. Pressing down on the metallic surface with a finger caused an interruption in the electrical current, and sensors detected where the interruption took place. This means the finger - touch broke the electricity flow which sensors picked up.

Answer:

The touch of a finger broke the flow of electricity across a metal surface, which sensors then picked up.