Coconut milk used in tissue culture enhances cell division and plant growth. what is the active ingredient in coconut milk that causes this effect?

Coconut milk is a liquid endosperm, and has been found to be a very significant enhancer of growth and proliferation of plant stem cell tissues in the culture. Cytokinins present in the cocnut milk are attributed to this effect. Cytokinins stimulate shoot initiation, root growth, cell division, and leaf senescence.

C- a hypothesis or d- an observation