|Question 17Verbal

Source Texts

Text
The story of Chile's electrification is perhaps most readily understood by studying developments in several key years: 1916, when engineer Arturo Salazar attended the Pan-American Scientific Conference; 1936, when the study entitled "Politica eléctrica chilena" was [Blank] 1943, when the national electrical plan was finalized.
Which choice completes the text so that it conforms to the conventions of Standard English?
released; and
A
released and
B
released. And
C
released, and
D