PART B: Which detail from the text best supports the answer to Part A?
A.
"She had been looking at symbols like these for more than a year and they still didn't make sense." (Paragraph 1)
B.
"At the time, Grotjan was one of just a few women working at the highest levels of code breaking." (Paragraph 5)
C.
"To 'listen to' secret Japanese communications, the United States used a complex system to intercept the communications and break the codes." (Paragraph 7)
D.
"Soon after Grotjan's discovery, the SIS and U.S. Navy built a Purple cipher machine just like the decoding machines used in Japanese embassies. " (Paragraph 11)