What does it mean to contaminate something?

• A. To make it cleaner and purer
• B. To improve its usability
• C. To make it impure by exposure to a poisonous or polluting substance
• D. To enhance its quality

Answer: (C)

Contaminating something refers to the process of introducing harmful substances that lead to its impurity. This definition highlights the negative impact of exposure to pollutants or toxins, which compromise the original state or quality of the item in question. When something becomes contaminated, it often loses its safety, effectiveness, or cleanliness, which is particularly relevant in contexts like food safety, environmental health, or even laboratory practices.

In contrast, other options denote positive changes. Making something cleaner and purer, improving usability, or enhancing quality all suggest an augmentation or enhancement rather than a detriment. Therefore, the accurate understanding of contamination is closely linked to the introduction of harmful elements, directly aligning with the chosen answer.