**Core Concept**
The cytopathic effects of viruses are the changes in cell morphology and function caused by viral infections. These effects are a result of the viral replication and interaction with the host cell machinery, leading to cell death or altered cellular behavior.

**Why the Correct Answer is Right**
Cytopathic effects of viruses can include cell lysis, cell fusion, chromosomal abnormalities, and changes in cellular metabolism. These effects are often a result of the viral replication and transcription mechanisms, which can disrupt normal cellular processes. For example, the influenza virus can cause cell lysis by inducing the formation of viral particles, leading to cell death.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because cell lysis is a well-documented cytopathic effect of viruses.
**Option C:** This option is incorrect because chromosomal abnormalities can occur as a result of viral infection and replication.
**Option D:** This option is incorrect because changes in cellular metabolism can be a cytopathic effect of viral infection.

**Clinical Pearl / High-Yield Fact**
One important high-yield fact is that the cytopathic effects of viruses can be used to diagnose viral infections through cytopathic effect (CPE) assays, which involve observing the effects of a viral culture on host cells.

**Correct Answer:** D.