"In the canneries of Baltimore, as is the case in similar establishments elsewhere, children are permitted to work for long hours, even though they may be very young. Incredibly small are the fingers that work along with those of the rest of the family, and if the child is too small to sit up, it is held on the lap of the worker or stowed away in boxes near at hand. . . .There are several dangers connected with this work when children do it. On every hand, one can see little tots toting boxes or pans full of beans, berries or tomatoes, and it is self-evident that the work is too hard. Then there are machines which no young persons should be working around. Unguarded belts, wheels, cogs and the like are a menace to careless children." —from a report on child labor in the canning industry of Maryland, by Lewis W. Hine, 1909 Which action would best help solve the general problem described in the excerpt?

A. passing federal laws limiting child labor

B. prohibiting children from working in canneries

C. making machinery safer for child workers

D. teaching child workers how to work more safely