Does "The use of sign language via videotelephony was hampered for many years due to the difficulty of its use over slow analogue copper phone lines, coupled with the high cost of better quality ISDN (data) phone lines." contain the correct answer to "In what decade were more efficient ways of using sign language via video-telephony developed?"

A: no

Does "In the later 1890s and into first decade of the 20th century, structural changes occurred in the operation of the Pacific trading companies; they moved from a practice of having traders resident on each island to instead becoming a business operation where the supercargo (the cargo manager of a trading ship) would deal directly with the islanders when a ship visited an island." contain the correct answer to "What is the term for a ship's cargo manager?"

A: yes

Does "British night air defences were in a poor state." contain the correct answer to "British night air defenses were effective to what height?"

A:
no