The most plausible answer is b, duration. the given amount of time is considered how long it last for.
Answer from: Quest
This would be canberra.
Another question on Chemistry
Chemistry, 22.06.2019 06:40
Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.