Which of the Following Is True of Merkel Cells

Which of the following is true of Merkel cells?

A) Merkel cells are located in the deepest layers of the dermis.
B) Merkel cells must be present in order for mechanosensory axons to detect mechanosensory stimuli.
C) Merkel cells communicate with mechanosensory axons via glutamatergic synapses.
D) Merkel cells respond to deep pressure on the skin and are primarily found in less sensitive skin areas such as the calf.
E) all of the above are true statements.