Refer to the Figure Below

Multiple Choice

Refer to the figure below. Consider that each time a growth factor binds to its receptor as shown in the figure, two ras G proteins are activated and each ras G protein activates one raf protein.If each raf then activates ten MEK molecules and each activated MEK activates ten molecules of MAP kinase, the original signal will be amplified by a factor of

A) 20.
B) 22.
C) 100.
D) 200.
E) 1,000.