Final answer:
The stratum basale, or stratum germinativum, is the layer of the integument with rapidly dividing keratinocytes, and the basement membrane is located between the dermis and epidermis.
Step-by-step explanation:
The layer of the integument containing rapidly dividing keratinocytes is the stratum basale (also known as the stratum germinativum). It is the innermost layer of the epidermis and contains stem cells that divide to form new keratinocytes. This layer attaches the epidermis to the basal lamina via the basement membrane, which also forms a connection with the dermis. Although the stratum spinosum contains keratinocytes, it is not the layer where they divide rapidly; hence, option C (stratum germinativum) is the correct answer.
Speaking of the dermal-epidermal connection, the basement membrane can be found between the dermis and epidermis, ensuring the separation and structural integrity of these two main skin layers, thus making option A (Dermis and epidermis) the correct choice for this particular part of the question.