In our TeaViewModel class, that extends ViewModel, we have such prorerty: val tea: LiveData<Tea> An observer in our Acti

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In our TeaViewModel class, that extends ViewModel, we have such prorerty: val tea: LiveData<Tea>
An observer in our Activity (type of mViewModel variable in example is TeaViewModel) is set in this way: mViewModel!!.tea.observe(this, Observer { tea: Tea? -> displayTea(tea) })
What will be a correct displayTea method definition?

A. private fun displayTea()
B. private fun displayTea(tea: Tea?)
C. private fun displayTea(tea: LiveData?<Tea>)
D. private fun displayTea(tea: LiveData?<T>)