Teacher:In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Teacher: Now, understand the problem? Solve this instance: In a world where computers are increasingly powerful and are concealed within ever more glossy slabs of aluminum, the Raspberry Pi (RPi) offers surprising proof for the virtue of moderation. Resembling little more than a credit card-sized scrap of exposed circuit board, the RPi is a fully programmable PC that runs a free, open-source Linux operating system, plugs into any TV, can power 3D graphics, connects to the Internet and, with a little ingenuity, be used to create your own personalized robot slave. The computer's miniature frame is crowded with two USB ports, an SD card slot, an Ethernet connection and microchip in the middle -- all powered by a universal USB mobile charger.The Raspberry Pi is a credit-card sized computer that costs little more than a textbookOriginally designed to encourage school children to learn programming skillsThe mini-PC now hugely popular with DIY geeks, who have used it to power their own creations 
 Question:It turned out there was a voracious appetite -- particularly among a growing class of _ geeks -- for a cheap, easily-programmable, open-source piece of hardware that would allow them to let their imaginations run wild.
Student:
DIY