question

[isilmatematik]

hi;
Please,you can answer the following question.
In the fırst half of the 20th century many scıentısts .... liquid crystal as chemical impurities with no scientific or practical merit
a)put down
b)wrote off
c)let go of
d)left out

[riverkid]

hi;
Please,you can answer the following question.
In the fırst half of the 20th century many scıentısts .... liquid crystal as chemical impurities with no scientific or practical merit
a)put down
b)wrote off
c)let go of
d)left out

As the one that seems most natural for the given situation, I'd choose b), 'wrote off'.