Ganel et al. (2008) designed a visual illusion (modified ponzo illusion) in which one line appears to be longer than another, when, in reality, the opposite is true. participants are asked to judge the line lengths and to reach and grab the ends of the lines. the results of this investigation reveal a. that the illusion only affects ventral stream processing. b. the effects of damage to the ventral pathway. c. the interaction of the ventral and dorsal stream. d. that the visual illusion affects both the ventral and dorsal streams.