Introduced in the 1930s, the first handheld cameras were A. too expensive to use. B. used primarily by families for home movies. C. used during World War II for newsreels. D. too heavy to use.

D) too heavy to use

Explanation:

After doing some research on the topic shown on this task, it is fair to conclude that, introduced in the 1930s, the first handheld cameras were too heavy to use, but, however, these ones were the equipment at the time, so the film-makers and journalists had to deal with the issue.

a woodchuck would chuck 12.5 wood : 3

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.