Which describes a cause of the war in vietnam?
a
power struggle between communist and noncommunist governments
b
u. s
support for the viet cong
c
wartime alliance between ho chi minh and imperial japan
d
french refusal to give up claims to indochina

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal