Considering the purpose of a caption in photojournalism, which of the following choices would best improve the caption for the above photo? caption: “runners, take your marks! ” a. runners, take your mark on the block! b. runners line up at the starting block for their race. c. runners mitchell johnson and jose consuelos are favored to win the 100m race. d. runners from various local high schools compete in the 100m race at nashville’s track and field finals on april 10, 2010.