TOEFL Reading: ETS-TOEFL阅读机经 - 36NM_B67B5I53R0VL$

According to paragraph 1, the rise of pictorial weeklies in the 1840s made possible in part by A. the discovery that electricity could be used to power printing presses B. the discovery that plates could be used to print magazines faster than before C. the development of new printing technologies D. the development of new methods for carving woodblock designs