Which of the Following Is a Correct Statement Regarding the Patch

Which of the following is a correct statement regarding the patch clamp technique?

A) The membrane attached to the pipet tip generally contains multiple ion channels.
B) Ion flow cannot be measured.
C) The current flow is constant.
D) The current flow corresponds to opening and closing of the ion channel.
E) The permeability of the channel does not affect the magnitude of the current.