A Key Difference Between Transforming Plant Cells and Human Cells

Multiple Choice

A key difference between transforming plant cells and human cells is

A) genes to be expressed in human cells require a eukaryotic promoter,and genes to be expressed in plants don't.
B) DNA cannot be introduced into human cells.
C) Agrobacterium is commonly used as a tool to directly transform plant cells but not human cells.
D) a vector is needed to introduce DNA into human cells and not plant cells.