Answer:
A). Cell Membrane.
Explanation:
The 'cell membrane' is most possibly malfunctioning in case a cell becomes incompetent to import the substances that it needs to process the chemical energy. This prevents the cell from functioning appropriately as the proteins present in the cell can not send the required chemicals to the organ and if a good number of the cells involve this malfunctioning, it may result in causing several diseases like hypercholesterolaemia, lysosomal storage diseases, etc. Thus, option A is the correct answer.
