**Core Concept**
Otosclerosis is a type of bone remodeling disorder affecting the middle ear, characterized by abnormal bone growth in the stapes bone, leading to conductive hearing loss. This condition is influenced by genetic and hormonal factors.

**Why the Correct Answer is Right**
The correct age for otosclerosis is typically between 15 to 35 years, with a peak incidence in the second and third decades of life. This is because otosclerosis is often associated with increased bone density and remodeling, which can be triggered by hormonal changes during puberty and early adulthood. The abnormal bone growth in the stapes bone can lead to fixation of the stapes, resulting in conductive hearing loss.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because otosclerosis is rare in children under the age of 10.
**Option B:** This option is incorrect because while otosclerosis can occur in older adults, the peak incidence is typically seen in younger individuals.
**Option C:** This option is incorrect because while otosclerosis can be associated with other conditions such as Paget's disease, the common age for otosclerosis is not typically seen in this age group.

**Clinical Pearl / High-Yield Fact**
It is essential to note that otosclerosis can be bilateral, and hearing loss can progress over time if left untreated. Regular monitoring and timely intervention can help prevent further hearing deterioration.

**Correct Answer: A. 15-35 years**