Final answer:
The correct answer is option c. Absorption. The poor cellular connectivity inside the new building with large glass windows is most likely caused by the absorption of radio waves by the glass and other building materials,.
Step-by-step explanation:
The large glass windows covering most of the walls and ceiling in the new building are likely contributing to poor cellular connectivity by absorbing the radio waves transmitted by nearby cell towers. While glass is usually somewhat transparent to visible light, it can be different for the radio frequency waves used by cell phones.
Materials like metal in the building's structure and the special coatings on the glass can interfere with the signal. Since the material of the glass windows may not allow cellular signals to pass through effectively, this could lead to absorption of the waves, weakening the signal inside. Another aspect is the signal's line of sight, which is optimal when there are no obstructions. Elevated structures for broadcast antennas are often used to maintain an unobstructed line of sight to ensure good reception for FM, TV, and mobile phones, but in this case, the building materials are impeding the signal.