Final answer:
Schleiden and Schwann mistakenly believed that cells could arise from noncellular materials, which was later corrected by Virchow's proposal that all cells come from pre-existing living cells.
The correct option is e.
Step-by-step explanation:
The error made by Schleiden and Schwann regarding a central feature of cells was that they both agreed that cells could arise from noncellular materials.
This misconception was later corrected by Rudolf Virchow who, in 1858, proposed the correct idea that all cells arise only from other living cells.
This is known as the third tenet of cell theory, which essentially revised the earlier proposal made by Schleiden and Schwann.
The correct option is e.