Variegated Four O'clock Leaves Have White Patches Among the Green

Multiple Choice

Variegated four o'clock leaves have white patches among the green areas due to

A) the presence of cells in which most of the mitochondria have a mutation that blocks electron transport.
B) the presence of cells in which most of the chloroplasts have a mutation that prevents synthesis of chlorophyll.
C) an incompletely penetrant mutation in a nuclear gene that prevents production of chlorophyll.
D) a recessive mutation in a nuclear gene that results in a defect in ribosomes.