The theory of force generation proposed (microfilaments can generate force, even in the absence of myosin, by elongating and pushing against a structure such as the plasma membrane) (also cytochalasins inhibit microfilament growth)is best supported by which of the following observations about amoeba locomotion? a. amoeboid movement stops upon expose to cytochalasins. b. amoeboid movement cannot occur if mitosis is blocked. c. moving amoeba cells produce more troponin than do stationary ones. d. the rate of movement is inversely proportional to the viscosity of the medium in the amoeba moves.