Does the sentence "By the 1st century BC, negative numbers and decimal fractions were in use and The Nine Chapters on the Mathematical Art included methods for extracting higher order roots by Horner's method and solving linear equations and by Pythagoras' theorem." provide a valid answer to the question "What advanced mathematical methods did the Tang dynasty have?"

A: no

Does the sentence "It is bordered by five countries: Gabon to the west; Cameroon to the northwest; the Central African Republic to the northeast; the Democratic Republic of the Congo to the east and south; and the Angolan exclave of Cabinda to the southwest." provide a valid answer to the question "Whic country lies on Congo's western border?"

A: yes

Does the sentence "Meteoric iron could be forged from a red heat to make objects such as tools, weapons, and nails." provide a valid answer to the question "Where does meteoric iron come from?"

A: no

Does the sentence "Biographies of Victoria written before much of the primary material became available, such as Lytton Strachey's Queen Victoria of 1921, are now considered out of date." provide a valid answer to the question "What year did Cecil Woodham Smith writ Victorias biography?"

A:
no