With Reference to Simple Cells, Which of the Following Statements

Multiple Choice

With reference to simple cells, which of the following statements is INCORRECT?

A) These cells sum together activity from several cells.
B) These cells are quite low in the processing hierarchy, that's why they are called 'simple'.
C) In the primary visual cortex, these cells respond to bars of light with a particular orientation.
D) These neurons are higher up in the hierarchy.