In the scenario where a house plant is sealed in a transparent glass container, the most likely factor that would lead to the plant's death is B. a lack of oxygen.
However, it's important to consider how the plant does photosynthesis and respiration. During the day, the plant uses sunlight to convert carbon dioxide into sugars (photosynthesis) and releases oxygen. At night or in the absence of light, plants perform respiration, which requires oxygen and produces carbon dioxide.
In a sealed environment, while the plant might initially have enough carbon dioxide and can produce oxygen during the day, over time, oxygen levels can deplete, leading to a situation where the plant is unable to respire adequately, causing stress and potentially death.
If the container is truly sealed and air exchange is limited, the lack of oxygen would likely be the critical factor causing the plant's demise. Meanwhile, a lack of light (D) during the night when the plant is unable to photosynthesize would also have detrimental effects, but the immediate reason for death in a sealed container scenario is more closely related to oxygen scarcity.
So, the answer that aligns best with the described situation is B. a lack of oxygen.