**Core Concept**
Sjogren's syndrome is a chronic autoimmune disorder characterized by lymphocytic infiltration of exocrine glands, particularly the salivary and lacrimal glands. The development of lymphoma in Sjogren's syndrome is a well-documented complication, often associated with the presence of specific clinical, serological, and histopathological features.

**Why the Correct Answer is Right**
The development of lymphoma in Sjogren's syndrome is suggested by the presence of lymphoid follicles with germinal centers, a high level of lymphocytic infiltration, and the presence of monoclonal B cells. This is often seen in patients with a high level of serum immunoglobulin G (IgG) and IgM, and those with a history of lymphoproliferative disorders. The presence of these features is indicative of a transformation from a benign lymphocytic infiltration to a malignant lymphoma.

**Why Each Wrong Option is Incorrect**
**Option A:** Lymphopenia is actually a feature of Sjogren's syndrome, characterized by a decrease in the number of lymphocytes in the peripheral blood. This is not a suggestion of lymphoma development.

**Option B:** A high level of serum immunoglobulin G (IgG) and IgM is actually a feature of Sjogren's syndrome that suggests lymphoma development, not a contraindication.

**Option C:** The presence of lymphoid follicles with germinal centers is actually a feature of Sjogren's syndrome that suggests lymphoma development, not a contraindication.

**Clinical Pearl / High-Yield Fact**
A high level of serum immunoglobulin G (IgG) and IgM, along with the presence of lymphoid follicles with germinal centers, are key features that suggest the development of lymphoma in Sjogren's syndrome.

**Correct Answer:** A. Lymphopenia