**Core Concept**
The question is inquiring about the level at which independent assortment of chromosomes occurs during cell division. Independent assortment is a fundamental concept in genetics that describes the random distribution of homologous chromosomes to daughter cells during meiosis I.

**Why the Correct Answer is Right**
Independent assortment is made possible by the random alignment of homologous pairs at the metaphase plate during meiosis I. This process is facilitated by the presence of the synaptonemal complex, which holds the homologous chromosomes together during prophase I. The random alignment of homologous pairs allows for the independent assortment of chromosomes, resulting in a unique combination of alleles in each daughter cell. This process is critical for genetic diversity and is a key feature of meiosis.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a level at which independent assortment occurs.
* **Option B:** This option is incorrect because it is not a valid level at which independent assortment occurs.
* **Option D:** This option is incorrect because it is not a level at which independent assortment occurs.

**Clinical Pearl / High-Yield Fact**
Remember that independent assortment occurs during meiosis I, specifically during metaphase I, when homologous pairs are randomly aligned at the metaphase plate.

**Correct Answer:** C. Metaphase I.