Eliza Had an Eye on Her Neighbor's Land for a Long

Eliza had an eye on her neighbor's land for a long time. In order to obtain adverse possession of it, she built a tunnel under the neighbor's property without the knowledge of her neighbor or any other person in the locality and continued to use the tunnel to hide money from her husband for several years. However, the court ordered that she was not eligible for an adverse possession. Why?

A) Because the possession was not hostile.
B) Because the possession was without any consideration.
C) Because the possession was not actual.
D) Because the possession was not continuous.
E) Because the possession was not open and notorious.