When a volumetric flask is filled to contain an accurately known volume: a.
the top of the meniscus must be at the etched or printed mark on the neck of the flask.
b.
the solution must be heated to its boiling point to fill the flask with vapor.
c.
the flask must be filled completely so that there is no air remaining in the flask.
d.
the bottom of the meniscus must be at the etched or printed mark on the neck of the flask.